Grimm&#39;s Wooden Toddler Preschool Puzzle, Sailboat (includes 7 Block Pieces for Stacking) Chunky block pieces are easy for young children to handle A great introduction to puzzles & creative building/construction The included solid wood frame (7.25 inches square) can be used as a building surface & for storage to keep pieces together Handcrafted by German company Grimm's Spiel und Holz Design based on Waldorf education principles Made of sustainably harvested solid wood gently colored using only non toxic, water-based, child-safe stains (no paints or varnish)