Just like pushbikes, they can't be used on pavements. They can only be used on roads if insured and taxed, but most of the kids ones you see would not be eligble for either, so basically you can only use them on private ground...legally.
They are a bloody pain in the A*** .Every monday morning its pension day and they go down the town in a bloody convoy,i'm not joking about 20 of the F******.