COMPATIBLE & GUARANTEED TIGHT FIT with all major building block sets. Classic size. DESIGN AND RACE original one-of-a-kind cars and CREATE UNIQUE HOUSES. This building brick kit will inspire hours of imaginative play for kids ages 3 and up. Manufacturered by Play Platoon. 10 DIFFERENT COLORS including tough to find Brown Purple and Orange. This product meets or exceeds U.S. Consumer Product Safety Commission Toy Safety Standards. LIFETIME REPLACEMENT WARRANTY - Play Platoon stands behind all of its products 100%. If anything ever goes wrong with these we will replace them with a new set. This product is not affiliated with or endorsed by LEGO. LEGO is a trademark of the LEGO Group of companies. 100 BONUS PIECES - You get a full set of 1000 regular building bricks plus a bonus pack of 100 wheels tires axels windows and doors!