Kmart offers the Huffy Boys' 10" Marvel Spider-Man Bicycle, model no. K7163, for $19. Choose in-store pickup to dodge the $7.99 shipping free. That's $31 off and a very low price for any kids' bike of this size. It includes training wheels.
*Huffy Spider Man Bike - Not sure what makes this a "boys" bike... my daughter loves Spider Man! A great deal too! :)