Frog Bikes

Most children's bicycles are simple Wald-and meadow bikes, and many children are totally satisfied with it, they do their first rounds comfortably and safely on a somewhat heavy, chunky mini bike. But what to do if the offspring has real sporting ambitions? If the little ones - like the big ones - want to accelerate on the racing bike, want to make the landscape unsafe on an MTB or are long bike tours?