Guidecraft Powerclix Piece Set 68 Comes with 68-Pieces Constructed of ABS Plastic and Neodymium Magnets Create a Super-Strong Magnetic Force that Creates a Quick Connect for Fast, Simple, and Powerful 3D Modeling that Helps Children Discover Principles of Science, Construction, and Engineering While Developing their Creativity Features Colorful Translucent Plastics and Unique Geometric Shapes/ Extender Rods Allow for Open-Ended, Creativity- Inspiring Constructions Activity Guide Included- Gives Young Builders Step-by-Step Instructions on How to Create a Variety of Models Recommended for: Ages 5+