NIB. Once Kids Color Wood Bricks 54 Piece Set are naturally dyed and biodegradable wooden construction bricks. Introducing our Eco-bricks Natural Wood Color Bricks 54 Piece Set - the perfect choice for eco-conscious builders who value sustainability, creativity, and quality. These color bricks are meticulously crafted from natural, biodegradable FSC certified wood, dyed with non-toxic water-based color. They are thoughtfully designed to be compatible with Lego® pieces, allowing you to seamlessly incorporate them into your building projects.