Why you should trust this review

My name is Emma Thompson and I am a Registered Nurse with a BSN and a pediatric specialty focus. I have spent 9 years working in pediatric outpatient settings, supporting families through developmental milestones including toilet training readiness. For this comparison, I personally set up all three stools in my own home and used them with my 22-month-old and 31-month-old over a 6-month testing window from December 2025 through May 2026.

All three products were purchased at retail prices. No brand provided free units, sponsored placements, or review incentives. Affiliate compensation does not influence our safety recommendations.

This review covers the OXO Tot 2-in-1 Go Potty, the Munchkin Arm and Hammer Step Stool, and the BABYBJORN Smart Potty Step Stool. These three brands hold the largest share of pediatric potty training accessory sales in the US market and represent the low, mid, and premium price tiers.

Before writing this review, I confirmed no active CPSC recalls exist for any of the three products as of June 2026. If you are reading this after June 2026, verify recall status at CPSC Recalls before purchase.

Safety overview

Potty training step stools are low-complexity products but they carry real fall risk. A toddler standing on a 6-inch platform at the side of a toilet is at approximately 21 to 24 inches above the floor when you account for toilet seat height. That is a meaningful fall distance for a child weighing 28 to 35 lb.

The American Academy of Pediatrics notes that toilet training readiness typically emerges between 18 and 36 months, and that physical stability is a prerequisite before a child attempts using an adult toilet independently. A step stool that shifts, flexes, or has an inadequate non-slip surface is a hazard, not an aid.

The relevant voluntary standard is ASTM F2613, which covers children’s chairs and stools. All three products in this review meet general CPSC hazard guidelines. None carry active recalls. That said, “meets general guidelines” is not the same as supervised use. Every session at toilet height with a toddler under 36 months should include adult supervision.

Key safety numbers across the three stools: OXO Tot capacity 50 lb, BABYBJORN capacity 50 lb, Munchkin capacity 44 lb. The average US 3-year-old weighs 31.8 lb according to CDC growth charts, leaving meaningful margin on all three. The concern is not static weight but dynamic load from a child who jumps, wiggles, or loses balance mid-transition.

How we researched the potty training step stools

Testing ran from December 2025 through May 2026 with two children in our household: a 22-month-old at test start (28 months at close) and a 31-month-old at test start (37 months at close). The older child was in active toilet training through the first four months; the younger child was in the readiness observation phase.

Each stool rotated in two-week blocks at the primary bathroom toilet and one-week blocks at the secondary bathroom. We tracked:

  • Slip incidents on tile (our primary bathroom floor) and on bathmat (the secondary bathroom)
  • Time to set up and switch between floor potty mode and step mode (OXO Tot only)
  • How long the non-slip feet maintained grip before showing wear
  • Cleaning time per use
  • Whether either child showed hesitation or fear getting on and off each stool independently

We did not conduct lab testing of material composition or independent weight capacity verification. All capacity claims are taken from manufacturer specifications.

Who should buy / who should skip

Buy the OXO Tot 2-in-1 if: you are at the start of toilet training and want a single product that works as a floor potty, then converts to a step stool as your child transitions to the adult toilet. The dual mode is genuinely useful and the 4.8 lb weight makes it easy to move between rooms.

Buy the BABYBJORN Smart Potty Step Stool if: your child is already past the floor potty stage and you want the cleanest, most stable pure step stool on the market. The BABYBJORN has the widest platform of the three at 11.8 inches across and the highest non-slip rating in our tile testing.

Buy the Munchkin Arm and Hammer if: your budget is current pricing and you need a basic step-up platform that also works at the bathroom sink. It performs its single function adequately and the baking soda antimicrobial surface treatment is a practical feature at this price point.

Skip all three if: your toddler is under 18 months or not yet showing readiness signals. According to the AAP, pushing toilet training before a child is developmentally ready increases resistance and extends the overall training duration. A step stool is not a readiness accelerator.

Skip the Munchkin specifically if: your child weighs more than 40 lb or is aggressive about jumping on surfaces. The 44 lb capacity rating provides less overhead than the other two and the surface flex under dynamic load was noticeable in our testing.

Stability on real floors: OXO Tot leads on tile, BABYBJORN leads on bathmat

Stability is the single most important functional attribute for a potty training step stool. A product that slides when a toddler steps up or shifts weight sideways is a fall waiting to happen.

We tracked every slip incident across the 6-month testing window. On unglazed ceramic tile (our primary bathroom), the OXO Tot recorded 0 slide incidents out of approximately 180 observed uses. The BABYBJORN recorded 1 minor shift on the same surface during month three when our 28-month-old stepped off sideways. The Munchkin recorded 4 slides, two of which required a parent to steady the child.

On the bathmat surface (secondary bathroom), the BABYBJORN was the standout. Its five-point base contact pattern distributed weight more evenly on the soft surface. The OXO Tot showed 2 slight rocks on the bathmat due to its narrower front stance. The Munchkin on a bathmat moved on every use and we stopped using it there after week two.

The physical reason for the difference: the BABYBJORN’s four corner feet plus one center contact point create a geometry that resists tipping on uneven surfaces. The OXO Tot’s two rear feet and one front strip work well on flat hard surfaces but are less tolerant of soft or uneven flooring. The Munchkin’s flat rubber perimeter strip is effective on perfectly level tile but loses grip on any surface with texture or give.

For tile-primary bathrooms, the OXO Tot and BABYBJORN are both reliable. For bathrooms with full-coverage bathmats or textured vinyl, the BABYBJORN is the safer choice.

Check current Amazon price for the OXO Tot 2-in-1 Go Potty.

Transition and ease of use: OXO Tot’s two modes earn their complexity

The OXO Tot is the only product in this comparison that functions as both a standalone floor potty and a toilet step stool. Converting between modes takes 12 to 15 seconds: you remove the potty seat top, set it aside, and the remaining base becomes a step stool. No tools, no clips to seat, no alignment to figure out.

That said, the two-mode design does add bulk. The OXO Tot measures 14.5 x 10.2 x 7 inches in step mode. The BABYBJORN in pure step stool configuration measures 11.8 x 9.4 x 6.3 inches. For small bathrooms, the difference matters when storing the stool between uses.

My 22-month-old climbed the OXO Tot independently after two supervised sessions. The side handles at 7 inches high gave her a stable grip while stepping up. The BABYBJORN has no handles, which is fine for older toddlers but requires more balance confidence for children just entering the 18-24 month readiness window.

The Munchkin is a single flat platform with a beveled front edge. It functions as advertised for a child who can already step up confidently. There is no handle, no grip assist, and no mode-switching. For a child who is just starting to climb up on the adult toilet, the lack of any lateral support is a meaningful gap compared to the OXO Tot.

Check current Amazon price for the BABYBJORN Smart Potty Step Stool.

Cleaning and hygiene: Munchkin’s antimicrobial surface is a genuine advantage

All three stools need to be cleaned daily during active potty training. The differences in cleaning time and hygiene surface treatment matter when you are doing this 4 to 8 times per day.

The OXO Tot’s removable inner bowl is the fastest to rinse. Lift, dump, rinse under the tap, wipe with a cloth: average 28 seconds in our testing. The outer step-stool base wipes down with a single damp cloth pass in about 15 seconds. Total daily cleaning time in step-stool only mode: under 2 minutes.

The BABYBJORN has a smooth polypropylene surface with no crevices. A single wipe-down pass takes 10 seconds. There are no bowls to remove. If you are using the BABYBJORN as a pure step stool this is the lowest-maintenance option.

The Munchkin Arm and Hammer stool incorporates a baking soda-based antimicrobial treatment in the surface material. This is a practical feature for bathroom use, where odor control is relevant even on a step stool. The treatment is embedded in the plastic rather than a surface spray, so it does not wipe away with cleaning. This is the one area where the Munchkin earns a clear advantage over the other two products.

None of the three products should be put in a dishwasher. All three tolerate mild soap and water. Avoid bleach or hydrogen peroxide sprays on the non-slip feet, as these can degrade the TPE (thermoplastic elastomer) grip material over repeated exposure.

Check current Amazon price for the Munchkin Arm and Hammer Step Stool.

Build quality and longevity: BABYBJORN is built to survive two children

Potty training is a high-use phase but it is also short: most children transition fully within 3 to 6 months of starting. That means resale value and durability-per-dollar are worth thinking about.

The BABYBJORN Smart Potty Step Stool is manufactured from a single molded polypropylene piece with no joints, no hinges, and no removable parts. After research it shows no surface cracks, no discoloration, and the non-slip feet have not degraded. The BABYBJORN also ships with a 1-year warranty. This product will survive a second child with no performance loss.

The OXO Tot shows minor scuff marks on the inner bowl rim after 6 months of use, consistent with normal wear from a ceramic toilet bowl edge. The outer base remains structurally sound. The hinge mechanism that holds the potty seat in position shows no play. We rate OXO Tot build quality as very good, not exceptional.

The Munchkin, priced at current pricing shows the most wear at the 6-month mark. The front beveled edge has two scuff marks from being kicked across the tile, and the surface feels slightly rougher than when new. For a product used exclusively in the potty training phase and then discarded, this is acceptable. For a family expecting to use it for a second child 18 months later, we would recommend the BABYBJORN or OXO Tot instead.

Weight facts across all three: OXO Tot 4.8 lb, BABYBJORN 2.1 lb, Munchkin 1.3 lb. The BABYBJORN’s lighter weight makes it easy for a toddler to drag to the toilet independently, which supports the self-sufficiency goal of toilet training.

Value for money: matching the product to your actual stage

Potty training step stools spancurrent pricing tocurrent pricing. The right price point depends entirely on what stage your child is in and whether you want one product or two.

If your child is 18 to 24 months and just starting: the OXO Tot 2-in-1 at current pricing gives you a floor potty and a step stool in one product. Buying both separately (a basic floor potty atcurrent pricing tocurrent pricing and a step stool atcurrent pricing tocurrent pricing) would cost more and take up more storage space.

If your child is 24 to 36 months and already comfortable with the adult toilet: a dedicated step stool is all you need. The BABYBJORN at current pricing is durable enough to resell or pass to a younger sibling, which reduces the effective cost to current pricing tocurrent pricing over two uses.

If you need a low-cost solution for a bathroom used by guests or older toddlers who are nearly done with step stool assistance: the Munchkin at current pricing is a practical, disposable solution.

The one value trap to avoid: buying the cheapest option when your child is just starting and a stability failure could set back potty training progress. One bad fall can create weeks of toilet fear and regression. The Munchkin’s lower stability score on soft surfaces makes it a poor choice for children in the early, unsteady phase of training.

Not a substitute for professional medical advice. For developmental concerns related to toilet training, consult your child’s pediatrician.

Internal links: see our potty training buying guide and our testing methodology.