adumbrodeus
Smash Legend
Note that the yo-yo lacks the raw force to be as strong as a flail normally is capable of because it lacks the bulk, however it is faster to attack, and more maneuverable, and is capable of doing considerable damage while requiring little strength because it's all centrifugal force and momentium.http://medieval.stormthecastle.com/armorypages/flail.htm
Well, it turns out flails are quite incredible weapons themselves. Better than swords in fact. The only reason they weren't used was because of people thought swords were cooler.
Flails carry and incredible amount of force behind them, even more than what a mace can deliver.
Looking for more info.
Honestly, perfect weapon for a kid.