Those are called trim stars made by saxon if I remember correctly I have a few NOS ones the box as stated they were popular on motorcycles and also used for cars as ornaments on the body or fender skirts.
There's one for sale on the h.a.m.b a forum on jalopyjournal.com
https://www.jalopyjournal.com/forum/threads/1964-mustang-pedal-car.1306196/#post-15064688