Build and explore limitless construction possibilities with these building blocks. A variety of shapes and colors encourage endless creativity and open-ended play. Use the blocks to build tall towers, crazy castles, funny creatures and more. 80-piece set is compatible with all Mega Bloks First Builder sets (sold separately). Plastic blocks are perfect for stimulating imagination, developing fine-motor skills, improving learning skills and more. First Builders blocks are designed for children ages 1 to 5.