A brilliant, practical system of solid wood blocks for building spatial, language, and problem-solving skills. 70 heirloom quality pieces that work with each other in more than 20 stage-based activities. Years of learning through play, crafted by child development experts. Use modular features to experiment with physics concepts like cause and effect, force, magnetism, velocity, and gravity. Build cities, act out stories, and create a world of wonder through open-ended play. Learn to plan ahead and reach a goal: assemble a simple box car in a sequence of steps. See how the storage box transforms into something new!