BIGGER PACKAGE (OVER 3 LBS!), MORE BRICKSMore building bricks than other sets of similar size. Contains 11 different colors and 154 roof pieces. Excellent supplement to the STEM education curriculum.WORKS WITH ALL MAJOR BRANDSMix and build with your existing name brand building bricks. Because we're SO confident you'll love our compatible building brick toys, 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.PREMIUM QUALITYMade of premium, high quality material that have been tested to comply with all US toy safety standards and are free of lead, cadmium, and phthalates.TWO FREE BRICK SEPARATORSSeparate connected bricks and plates effortlessly with this free, easy-to-use tool.REUSABLE STORAGE BOX WITH HANDLECollect and store all your bricks conveniently in one place to keep dirt and dust away. The top of the box has a comfortable handle for easy carrying; perfect for travel. DISCLAIMER: LEGO is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this product.