Link pop sort and sequence to build a colorful inchworm! Soft plastic Pop Blocs make it easy for children to snap the pieces together to make a spiral loop or zigzag chain . . . then pull them apart with a pop. A wonderful tool for developing manual dexterity hand-eye coordination and finger strength Build an Inchworm includes a cheerful face block to give personality to chains of any length. Great for color recognition sequencing and more!