Grades K & up. Set sail with real STEM learning! Young learners can dive into early physics in a fun, colorful way with this two-piece submarine and floating raft along with weights, balls, and stars to bring investigations to life. This set also features 10 detailed Activity Cards (with over 20 engaging, high-impact activities) that cover all aspects of STEM, plus key science concepts of buoyancy, density, and more! Comprehensive activity guide with reproducible materials is also included. Largest piece (submarine) measures 6"L x 3 1/2"H.