I think laws differ regionally in the U.K it’s 14 years for e bikes on road (some countries it’s 16) but I actually saw a Kickstarter for a kiddie e bike although that was tiny & for weenies!
I think AMX would be perfect for them,I got the mini as it’s smaller 20” wheels so I can store it with little space & it still fits into cars etc.
Value for money and so easily customised with standard bike parts everywhere but the e system.
Worth looking out for second hand AM1’s on eBay from backers who upgraded to AMX bikes,I’m always seeing mate bikes cheap - I have a mate and it was excellent but a little heavy for me. My brothers now using it after I did 3k miles on it! Those go for as little as £300 on eBay now...
Lucky kids lol all we had was conkers! 😉