Hello! Yes DS used a walker from 3 until 6. He started walking independently at 4 but continued to use his Kaye walker in the playground or for longer distances. At about the same time , age 4, he started to use tripod sticks as he got a better gait pattern that way and he had to go slower!
So at school he'd use sticks in the classroom and Kaye walker in the playground.
We have carried on this transition and he now uses normal sticks, not tripod ones within school and therapeutically (ie at Physio). He is completely independent in the playground although he does fall regularly. At home he walks with no aids unless his gait is terrible when we make him use sticks but for longer distances or days out he uses a wheelchair.
DS is now 8 and has CP so is slightly different, I do have two friends both with DC with undiagnosed genetic conditions. One no longer uses a Kaye walker or any other aids and while her gait is not completely normal it's not far off and is improving all the time, that DC is now 6 and dropped the Kaye walker before starting school.
The other DC is 8 and still uses his Kaye walker but can take independent steps, for him it's more bout confidence and t's been a slow steady improvement. His gait is perfect in the walker.
It's a mixed bag and depends on many things, most of which we, and the professionals don't know. How exactly the brain will respond, how much Physio you have access to and your hold will tolerate, how any physical progression will be helped or hindered by growing bigger.
Good luck, ssorry for the l