I have tried her with 20” wheels, then 16” wheels but both too big. So i bought her one of those kids electric scooters. She loves it. Looks odd seeing a granny of 12 grandkids bombing around the streets on an electric scooter with a seat but she doesn’t care. And of course it’s not road or pavement legal. So i’ve looked through the internet and found UK BeatBikes. They seem to go back a bit to 2012. I don’t even know if they are still available. Has anyone any experience of them?
https://www.beatbikes.com/shop/beatbike/
https://www.beatbikes.com/shop/beatbike/