Our 24 piece Unit Rocks are a great introduction to block play for beginning builders, or take building further using them as an extension to our larger Unit Rocks and Unit Bricks sets. Just like all of our bricks, our 25 piece Unit Rocks are sustainably made from solid wood, weighted and measured for small hands and finished in all organic paint. A great building foundation for STEM-play and investigation. Each 24 piece set includes: 10 Half Units, 10 Units, 2 One-and-a-half Units, 2 Double Units. Built to the scale recommended by childcare expert Caroline Pratt, our standard Unit Bricks measure 140x70x35mm. Beautiful and built to last heirloom quality Architectural shapes promotes wide exploration of weight, balance, measures and forces, and lay good foundation for mathematic learning Develops fine, small and gross motor skills Encourages design, creativity, planning and big thinking Suited to solo or collaborative building Fits with your home or school’s existing block collections Colour and shape resembles real stone 18 months +