WELL DESIGNED CONTRAPTIONS: Unlike other Rube-Goldberg type toy contraptions, our KEVA Junior Brain Builders Playset employs snugly, fitting non-warped pieces that don't have breaks. Regardless of whether your child wants to build original contraptions or follow one of the puzzle cards, you can rest assured knowing there won't be any frustration or annoyances!;INTERCHANGEABLE: These planks are the same size and shape as other Kapla or KEVA planks and can be used interchangeably with those systems to construct elaborate and expansive structures.;TOYS THAT TEACH: Our KEVA Junior Brain Builders are fantastic toys for teaching children to embrace their creativity and design engineering marvels. With 20 identical wooden planks crafted to be used with any of the puzzle cards, this playset is perfect for any child looking to build while simultaneously learning problem solving with basic physics. In time, you'll have an architect on your hands!;NO HASSLE: With no glue or connectors needed, our KEVA Junior Brain Builders Playset set is ready to play right out of the box. Forget the hassle of having to round up a laundry list of non-included tools. Simply unpack and build!;INCLUDES: Package includes 20 identical wooden planks and 40 puzzle cards.