Build and stack offers unlimited fun with First Builders Big Building Bag. These bright primary-colored blocks encourage hands-on exploration as children imagine and create. The blocks are big and easy for little fingers to assemble. The Bag includes 80 blocks and an attachable wheelbase to create cars and trucks. Blocks are compatible with all other Mega Blocks First Builders sets for endless building possibilities. When playtime is over, zip blocks up in the eco-friendly bag and stash them in the toy box until next time. For over 30 years, MEGA Brands has created construction toys, games, puzzles, stationary, and arts and crafts. They offer engaging and creative experiences for children, families, and collectors through innovative, well-designed, affordable and high-quality products. The blocks, teach children fine motor skills and encourage open-ended play to stimulate the imagination.