Grimm's Colored Rainbow Geo-Blocks - Classic Wooden Building Blocks Set with Net Bag, 30 Pieces Building blocks are foundational for children's play and promote motor, language and social skills, plus creativity, and color & shape perception Set includes a total of 30 blocks in a variety of shapes and sizes and is handcrafted in Europe Vibrant colors are actually certified non toxic, water-based stains; No worrisome paint or varnish! Blocks easily combine with other building blocks sets for larger construction projects Grimm's adheres to Waldorf education principles, therefore no lacquer or varnish is used, giving the blocks a natural feel that's also ideal for slip-free building projects