Comment by jbarrow

This trick is also the way to teach adults, if you're teaching or learning to ride!

For children, there are companies that sell progressive balance bikes[1][2], that start off as balance bikes but can be converted to pedal bikes later. In the US, I've seen tons of cheap Strider bikes on Craigslist, and then you can get the pedal conversion kit separately (you have to get the 14", not the 12").

[1] https://striderbikes.co.uk/collections/14x-balance-pedal-bik...

[2] https://www.littlebigbikes.com/shop/convertible-balance-bike...