Built to the scale recommended by childcare expert Caroline Pratt 22 parts BPA-free Organic paints and dyes Solid hardwood 100% earth-friendly Recommended Age: 18m+ STEM.ORG Authenticated Promote early STEM math skills with our toddler scaled hardwood building bricks. Standard Pratt scale bricks are developmentally appropriate for children as young as 18 months. Building possibilities are endless with our toddler bricks set. With 22 evenly weighted, hand-carved bricks, toddlers are able to make elaborate realistic structures from castle forts to magnificent towers. Beautiful and built to last heirloom quality Hand-carved textured wood is tactile and weighted to suit children‚ developmental and cognitive needs. Architectural shapes promote wide exploration of weight, balance, measures, and forces, and lay a 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 existing block collections Natural appearance mimics real-life bricks Based on Pratt scale standard unit blocks All-natural organic paints and dyes Unit Bricks are made from solid hardwood; 100% earth-friendly Eco-friendly card box packaging Standard Unit Brick measures 140x70x35mm (5.5x3x1.5 in) All Unit Bricks products conform to major international safety requirements for toys (ASTM, CPSIA, EN71) Designed in Hong Kong and the USA With no additional tools required, budding engineers are ready and able to create, develop, re-work, and marvel at their creations. Start your budding builder off on the right track with our Toddler Unit Brick sets. Realistic blocks made to last generations.