Eco-bricks™ Bamboo felt sets are natural and biodegradable bamboo construction blocks and come with adhesive felt shapes that add an additional layer for sensory development and customization. These removable felt-shaped stickers are spun from recycled plastic bottles, therefore, sustainable, too! Benefits: Bamboo has antimicrobial properties - stays clean in high use! Bamboo is also fast-growing and carbon neutral These interlocking blocks aren't just fun - they are friendly to the planet, too! Features: Made from precision-carved natural bamboo and recycled plastic bottles spun felt-shaped stickers Compatible with plastic blocks Encourages fine motor skills and environmental awareness Assorted style blocks for endless design configurations High-quality design for lasting durability Recommended Age 4