5 years and up. Revolutionize Stem play with the Plip Kit Silicone Connect System. Including arches, sticks, and Xs, the pieces in this kit are flexible and connect to one another via ball-and-socket ends. This means that children can use them to create any design imaginable whether it's a rocket ship, an octopus, or a necklace. Plip Kit pieces can also be used as fidgets and sensory tools! Pull them apart to hear them Pop! Set includes 46 pieces.