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.
4 years & up. The science of light has never been more exciting! This set comes with 8 experiments for young scientists to experience light in different optical alterations. Pieces can be cleaned with a damp cloth; do not wash under a faucet. Pieces should be stored in a dry place to avoid damages. Includes 53 pieces.