These sturdy, double-sided cards offer nearly 40 hands-on activities that support the investigations of simple machines. Featuring a write and wipe surface and a durable storage file box, these cards are the perfect addition to your STEM education supplies. Students can explore simple machines and how they work through real-world examples and problem solving opportunities. Use these cards as a partner activity or for individual work in a classroom science center. For best use, pair with the Learning Resources® Simple Machines Set. Plastic. (20 pcs. per set) 10" x 7"