The ZOOB 0Z11021 ZOOBTUBE 20 Moving Mind-Building Modeling System is a building set that"s different from the rest! The pieces can be moved after being put together, so kids can play with their ZOOB creations, instead of just looking at them. ZOOB pieces snap, click and pop together to form joints that rotate, limbs that extend, axles that spin and lots more. Kids can create simple models in minutes or get absorbed and spend hours at a time. There"s no limit to what they can build: from animals to aliens, from dinosaurs to DNA. Since ZOOB is based on real-life systems, its built-in educational value encourages kids to learn, explore and create using the most important tool of all: their imaginations. Competitive advantages include movement, appeal to both boys and girls, versatility with unlimited open-ended building options, intuitive design that"s fast to learn and easy to use, as well as built-in educational value. ZOOB�s shape is inspired by the nucleotides (the basic structural units of nucleic acids) that make up DNA. Based on the way things connect, move and transform in nature, ZOOB captures dynamic movement, unlike traditional �stacking� or �hub and spoke� construction sets. The ZOOBTUBE 20 contains (20) pieces in classic colors for endless fun. The ZOOB 0Z11021 ZOOBTUBE 20 Moving Mind-Building Modeling System comes with a lifetime guarantee. ZOOB is an award-winning building set with a difference! Although we provide instructions and suggestions for models to build, we think the best part of playing with ZOOB is exploring, inventing, and discovering how you can build what you want to build.