Perfectly legal method of transport and a common sight in the Netherlands
While over here in sunny Sydney, FFS even the dolls have to wear bike helmets, American Barbie is alllllll about the liability rather than the data. This is the same Barbie who has a Dream Car, which next opportunity I get, I'm going to check for seatbelts.
Thankfully to balance things out, one shelf over those Japanese hippies over in the Sylvanian Families section ride helmet-free. Bless.