The perfect introduction to ZOOB building sets. Learn how the pieces fit together for unlimited creative building. This 15 piece set comes with easy to follow instructions to make a cell phone, airplane twirling top and little critter. A party favor kid’s would love to take home! Use this building set with other ZOOB sets, sold separately. ZOOB pieces are based on a natural and living system and features pieces that snap, click or pop together in different ways, making building easy and versatile. ZOOB building sets are unique in that the pieces move after they are put together, allowing for truly interactive creations.Collect ZOOB sets for more interactive pieces!