[NativeSon]

50. Whiffle balls What made it the best: The bat. What made it the worst: You could never figure out how to actually play Whiffle ball.

cut the end off the "bat" stuff it full of wet newspaper. Now you have a more proper bat/weapon

[Gothmog]

wiffle ball bats — stick bottle rockets in the hole at the end and use them as rocket launchers against your friends, ha ha ha.