The SmartMax Start Plus set is perfect for building amazing structures. It comes with 12 medium bars, 6 long bars, 4 curved bars, 8 metal balls, and a guide to build models. There are additional extension sets that can be bought separately. SmartMax is designed for children to safely explore magnetism, with large and sturdy pieces easy for young kids to handle. Made from high-quality materials, the magnets are incredibly strong and can carry up to 60 times their own weight. The magnetic bars feature unique color codes with "cold" colored bars (blue, green, purple) attracting "warm" colored bars (red, orange, yellow) and vice versa. The set comes with a comprehensive and colorful guide with product information and sample designs. All parts are compatible with all SmartMax sets, providing limitless building possibilities.