My wee one is 3 and a half now, he’s been on it since he was 2.
It’s an excellent thing for exploring
Sometimes he bounces up and down on it and it shifts. It’s him jumping up and down, not being bounce about. When that happens I have to make sure the rubber lump is firmly in contact before tightening it up again.
I made some pogies out of oven gloves and some goretex. They are still on this month. My wee one frequently refuses to wear gloves and we have had several rides cut short due to cold hands.
The bike the seat was on initially was stolen. The one it is on now is much longer. He just about misses my face when he stands up :-)
It’s been great fun