Guess which objects are magnetic that's the fun (and the Learning! ) behind our magnetic discovery board. Objects are randomly arranged in the 16 wells of this all-wood board, and children can PREDICT, observe and record their findings. (Tough acrylic cover can be removed by adults to switch objects out and screwed back in place to lock them in; use with our mag-wands (#Mag, sold separately); room for more than one child can use the board at once; board measures 9" x 12" x 3/4"H) - discount school supply item # PREDICT.