Or you could buy a bike, take the pedals off, use it as a balance bike and then put the pedals back on when they can balance properly. Saves buying two different bikes.
Don't bother with these, I did the whole wooden toy thing with our youngest. This was really heavy and cumbersome get one of these instead, best value item we purchased ! https://www.amazon.co.uk/Chicco-Pink-Arrow-Balance-Bike/dp/B00HYZIOES/ref=asc_df_B00HYZIOES/?tag=googshopuk-21&linkCode=df0&hvadid=310666391654&hvpos=&hvnetw=g&hvrand=10460747576638491296&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044998&hvtargid=pla-423844205518&psc=1&th=1&psc=1
We’ve had this a couple of years now, pretty solid and no real complaints