We've had this checked out from the library for a long, long time (checkout periods have been extended because of the pandemic). So we've had time to do a lot of these tricks and most of them have been great! My daughter's 1st grade class was especially impressed with the soda can jumping out of the mug. We never mastered the coins on a bottle one, though. Overall, this has provided hours and hours of educational entertainment over many months. ( )