Grades 3 & up. Students build explore and experiment with functioning simple machines that demonstrate essential science and technology concepts. This set includes a teaching resource guide, building materials, and a full-color student guide with real-life photos and key facts. Resource CD includes teaching notes, building instructions, and extension activities. Materials store conveniently in a sturdy, plastic tub with adjustable divider. 221 pieces. Made in the USA.
3 years & up. Three sets of loose stones includes: assorted tumbled stones, rock crystal with rainbow tumbled stones, and agate tumbled stones. Each set has approximately 30-35 stones equal to 1 pound and are approximately 1"L. Perfect for loose parts activities, sorting, and discovery.