The Zometool Creator Kit is an advanced construction system which allows building in 62 directions in space, using the same proportions found in growing cells, crystals, and other natural forms. Inquisitive minds will marvel and discover mathematical connections between space and the natural world. The colorful, sturdy plastic struts and nodes easily connect to holes with matching shapes, making it possible to engineer even intricate models with ease. Easy-to-follow, step-by-step, illustrated directions are included. The Zome System is used in schools worldwide--elementary through college--and by leading scientists, artists, mathematicians, engineers, and creative kids! The Zometool Creator Kit is a recipient of the Parent's Guide Children's Media Award.
Recommended age: 5 years and up

You might never stop building once you get your hands on the 50-model building set from K'NEX. This super value set includes pieces to build over 50 moving machines, creatures, and rides, plus a bonus battery-powered motor to set the models in motion. A 225-page instruction manual features step-by-step instructions for three levels of building, depending on your child's age and skill level. The color-coded rod-and-connector system and visual instructions make construction simple while teaching hand-eye coordination and planning skills, as kids build everything from a sea turtle to a racing car.
Recommended age: 8 years and up