Went to the bike shop today and got the boys one each, the 4 year old had a 16" frame and the 5year old a 20" frame, same bike for both of them. They both jumped on a couple and started riding round the shop - lol - They chose what made them comfortable and both were so happy this afternoon when riding round in our cul-de-sac. Great fun and so good to see them happy on new bikes. The 20" is just slightly too big for the 5year old I feel, but the shop guy seemed very comfortable with it, and so did the rider, so went with that - We did get him on the smaller 16" but it was defo too small.
Until these they had mountain bike "type" bikes without pedals, the push along ones, they were throwing them round so much I thought it wouldnīt take them long to get used to these new bikes. they arenīt using the pedals properly yet, but have their balance and I expect real pedaling in due course :-)
Was interesting for them with the new idea of "Brakes" - Both were rather shocked. LOL.
Did have stablilizers on the smaller ones, but he made me take them off after an hour, and with his balance being so good I saw no problem with that. They both were so good at throwing the old pushbikes around that did them the world of good as practice.