75% More Pieces Than Other Similar Sets, Up To 6 Players Can Play At The Same Time - We give you more blocks, more wrenches, more movable wheels, more plates, and more nuts & bolts than any other set. Because we're so confident you'll love our STEM Construction Engineering Building Blocks, it's backed by our No-Hassle Satisfaction Guarantee. If you don't love it for any reason, you can return it for a full refund. | Supports STEM Education - Designed to enhance your children's Science, Technology, Engineering, and Math skills. Improve your kids' imagination and creativity by challenging them to build their own cars, animals, robots and anything they can imagine! Our educational building blocks grow with your child, too! We include a large, full-color guide with 42 designs your kids can build, starting from easy for younger kids to advanced designs for older kids. | Gift A Toy That Encourages Your Child To Learn Through Play - Specially created to help your child develop hand-eye coordination, master fine motor skills, improve logical thinking, & boost vital problem solving skills. It's the ultimate toy that also promotes the importance of teamwork & collaboration, builds social skills, supports creativity, and improves imagination through interactive play. | Hassle-Free Enjoyment Guaranteed - Brickyard Building Blocks STEM Construction Engineering Kits are easy to wash and come with a sturdy storage box for quick and convenient cleanups. Each of the 163 bright, colorful, non-toxic pieces are certified Phthalate, Lead, Cadmium, and BPA-free. We invested in child-friendly materials and rigorous lab tests to make sure your kids are 100% safe from harmful chemicals. | New Superior Designs Give You More Ways To Play - Our bolts are custom designed with a built-in screwdriver slot so they can be used with either the wrench or the screwdriver to allow for even more ways to build. We also give you MORE tools than other sets: Four (4) dual-purpose "clicking" wrenches, a kid-friendly screwdriver, & a special combination wrench so more of your kids can play at the same time.