Techno Kids Fun Trax provide the perfect platform to help your little engineers and architects start imagining and building. The chunky pieces are easy to put together and perfect for little hands. Different elements are included in each set to spark the imagination and curiosity of your preschooler to create fun and exciting marble runs. With these interchangeable sets, the only limit to their play is their own imagination. These products align with and support STEM (Science, Technology, Engineering and Math standards). Ages 3+ years.