Crazy Calculator
Have you heard about the Crazy Calculator, the calculator that hates math? It's both a prank calculator and a real calculator! When your friends are around, use it in prank mode. Whatever equation you enter, the answer will come up crazy: I H8 MATH, ASK NICELY, TRY LATER, WHO CARES, GO AWAY, and more! But when you really need an answer, switch it to normal mode and get the correct answer. Sweet! It's solar powered with battery backup and has an automatic shut off timer.