Unlock each box to explore what's behind each door, This set of six wooden lock boxes is ideal for learning shape, color, and spatial relationships. Sort the shapes into the appropriate boxes, view them through the transparent, colored acrylic windows, and unlock the doors to retrieve them, Builds muscles in little hands and strengthens problem-solving and fine-motor skills. The chunky, solid wood shapes are easy to grasp, and all six boxes fit into a handy storage tray. Each lock box measures 4.2"W x 4.2"D x 4.2"H. Ships fully assembled. Ages 2+.