Eco-bricks™ Plus are natural and biodegradable wooden construction blocks. Eco-bricks™ Plus are twice the size of our traditional Eco-bricks™ and are made from FSC certified sustainable wood, biodegradable, and a renewable resource. The wooden blocks are 100% compatible with both plastic blocks and traditional Eco-bricks™ (so you don't have to start your whole collection all over again). Eco-bricks™ Plus 42 piece set are toddler sized blocks that inspire creativity, are customizable, can be used with crayons, markers, paint, stain, or even carved. Patent Pending. Benefits: Natural, Biodegradable, FSC Certified Wood Construction Blocks. These interlocking blocks aren't just fun - they are friendly to the planet, too! 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, paint.