Eco-bricks™ Color Plus are twice the size of our traditional Eco-bricks™ and are naturally dyed with water-base color, FSC certified sustainable wood, biodegradable, and a renewable resource. The colorful wooden blocks are 100% compatible with both plastic blocks and traditional Eco-bricks™. Eco-bricks™ Color Plus 25 piece set are toddler sized blocks that inspire creativity! Patent Pending. Benefits: Natural, Biodegradable, FSC Certified Wood Construction Blocks. Non-Toxic Water-Base Color. Features: Compatible with plastic blocks. Encourages fine motor skills and environmental awareness. Assorted style blocks for endless design configuration. Natural blocks can be personalized with additional medias such as colored pencils, markers, crayons, and paint. Includes: 15 - 4 Dot Colored Wooden Blocks 10 - 8 Dot Colored Wooden Blocks Packaged in a laser engraved wooden storage box.