Premium Vector 2 shadow game Shadow System 2 Block Cards Variable Image Stacking Simulator directx9 Shadow rendering through wall Game Development Stack Exchange Building Stacking Game at Wendell Espinoza blog. Stacking blocks are a must to have at home. The play possibilities are endless with no rules or guidelines. With these blocks, kids can learn about shapes, colour sizes and balance. This set comes with an instruction booklet that will give ideas on how to get the shadow of your masterpiece. Comes with 12x stacking blocks, 1x stacking tower frame and 1x shadow stacking game booklet. Each block measures approx 4 8cm W x 3 4. 5cm H x 2. 4cm W Suitable for ages 3+