DURABLE & SAFE- Our educational building kits use only the best quality birch wood. Finely polished with no rough edges these are guaranteed to be the go-to toy blocks in your children's closet for years to come! And of course Zenius toys are non toxic and have been tested to comply with the applicable federal safety regulations. DESIGNED FOR ANY GIRL OR BOY AGE 6 YEARS OLD AND UP- Our wood sets were designed for six-year olds and up but kids and teens (and even adults!) of all ages will enjoy this unique block building fun. Zenius is easy for kids to learn yet still complex to keep the grownups entertained! Manufacturered by Zenius. STEAM/STEM LEARNING TOYS- Studies show that building toys such as Zenius can help kids build fine motor skills and hand eye coordination. The unique design of Zenius will also aid in critical thinking problem solving and reasoning. 100% SATISFACTION GUARANTEED- Your child will be delighted with Zenius kids building toys. If for any reason you are not fully satisfied we offer a 45-day money back guarantee. Just send it back in original packaging and your refund will be on the way. DISCOVER THE HOTTEST 2020 STEM BUILDING TOYS - Create structures large and small by attaching the natural wood blocks with plastic screws. Each wooden toy block is fitted with plastic holes. Align the holes and use the included screwdriver tool to drive in the screw. Simply Zenius!