dd has had a micro scooter (the ones with the two front wheels) since she was just over 2 - she's very speedy and uses it loads. ds (2.3) is now showing an interest - he's fairly stable, if slow.
So, do we buy another three wheeler for ds to use, so dd can keep hers, or do we buy her a new two wheeler that will last a while so ds can use her old one (which is in perfectly fine condition)? I have no idea what age the mini micro scooters go up until realistically, nor what age they can usually make the transition to a 2 wheeler.