Grades K & up. Attract early learners to the wonders of magnetism! STEM lessons are irresistible when you add the excitement of fun, colorful tools to scientific exploration. Durable, playful magnets in a variety of shapes engage children as they explore magnetism, polarity, and magnetic attraction and repulsion. Comprehensive Activity Guide with reproducible materials is also included. Largest piece (maze tray) measures 11"L x 8 1/2"H x 1/2"W.