Build eye-hand coordination and cognitive, fine motor, language, problem solving, and spatial skills with Peek-A-Boo Lock Boxes. Each box is a 4 1/4″ cube with a door on the front, a translucent, colored, acrylic window on the back, and cut-out on the roof for dropping in a corresponding shape. Each box features color-matched door, window, and shape and a unique fastener. The boxes fit securely in color-assigned squares on a wooden storage tray measuring 15 3/4″ L x 10 3/4″ W x 1/2″H. Play hide and seek with the boxes, asking child to guess what’s behind a door, then check his answer by looking trough the window. Retrieve shape by unlocking the door. Consider using small toys or found objects from walks outdoors for the memory game.