The best bike for your son is waiting
Squish 16" Stage 3 Unisex Kids Bike Age 5-7 Low-Used VGC Red Yellow KB-294
Forme Kinder 20" Unisex Kids Bike Age 7-9 Low-Used VGC Bright Blue KB-404
Isla Bienn 20 small - Red - Unisex Kids Bike with mudguards
Squish Bike 18'' Unisex Kids Bike Blue/Green, Lightweight
albri, Bicycle 14 inch Avengers unisex kids, blue
