This set includes all you need for a variety of activities involving probability. It includes a spinner, which is a clear piece of durable plastic measuring 4.5" x 4.5" (with a black plastic spinner in the middle), two standard dice of different colors, two numbered 12-sided dice of different colors, and a numbered 8-sided die. Whether you're making up your own probability exercises or following a book, these items come in handy. CHOKING HAZARD (1). Not <3yrs.