I stumbled across this blog entry, where the Accordian Guy is showing off his “Hulk Hands”, large foam gloves that make amusing Hulk noises when you bounce them off things.  I got a set for my nephew once, and I liked them so much, I got myself a pair too!  Its hard to describe the visceral pleasure of bopping the wall or desk, and hearing the tinkling sound of broken glass, followed by a roar and “Hulk smash!”  They make half-way decent boxing gloves, if you’re just playing around; and having recently bought some IKEA bookshelves, I’ve discovered that they also make excellent bookends.

Highly recommended – go buy a set for every kid you know, and keep one for yourself!