Why It's Great:  Because some decisions can only be made with the help of an advice-granting billiard ball.

Simplicity itself, the use of an icosahedral (or twenty-sided, to non-mathematicians) die means hours of fun mixing and matching your call-and-response.

Fact To Be Toyed With:  Amongst virtually unlimited spoof variations on the concept, is the Magic Cheezburger, which imparts its knowledge in LOL speak.

Get It Here:  Mattel's classic can be ordered via Mail Order Express.  For the Cheezburger, head to LOLmart.