Guidecraft Texo Architecture STEM Educational Building Toy 100 - Piece Construction Set 1. Award-winning 3-dimensional design created by architect, author, and designer lester walker. 2. Classic open-ended construction toy introduces kids to a variety of design and building systems for ages 3+. 3. Educational focus: fine motor skills, architectural understanding and imaginative construction. 4. Material: plastic rods, geometric connectors and solid wood planks. 5. Set includes 100 pieces and activity guide with creative how-tos and easy step-by-step instructions.