Grimm's | Building Boards NaturalThe Grimms Building Boards are the perfect complement to the larger Grimms pieces and semicircles. There is an endless variety of play and construction potential with these boards and a world of balancing and skill games too. A superb, versatile and open ended wooden play component, build and extend your play with all building sets and blocks. Width 7cm Lengths from 10 to 37cm x 0. 8 cm thickness. Materials: lime wood, finished with a non toxic water