https://www.amazon.com/Lightweight-A...language=en_US
The first link is a Laufrad. That is not something for a 6 year old. That is usually used by a three year old, i.e. to learn the balance.
The other just look like "normal" children bikes.
I would buy one second hand or make sure that it can grow with the child otherwise. The bike must be the rigth size, otherwise you won't be able to use it for a long time.
Look for VeloboĢrse in order to find a second hand bike. Many KinderkleiderboĢrse or similar will have those as well
A second hand is a good idea.. I will look around also for that.
I never knew they made belt driven kid's bikes. Does kinda make sense - no sharp teeth, less greasy stains.
Up until now I always thought belt driven bikes were just a hipster thing - you know, a 'chain' being too mainstream and all
So it's not a "normal" bike. It is a special bike. Then I don't think you will find a second-hand one. Sorry. But you should still try. But I doubt that you will find one but maybe you will get lucky. Enjoy spring with wichever bike
That said, I have two shafties, one of which is open and even messier than my chain drive bikes!
Tom
If you get your fingers in it, it's not going to be much nicer than in a chain - it's still going to squash them.
Chains on non-derailleur bikes don't need much oil and never come off because they're quite tight, so not really different there either.