- Strap is a challenge for the common bookcase. It plays with color, shape and possibilities. As it’s modular, allows you to create your Strap like you need it. The solidity of the structure allows Strap to be used as a self-supporting dividing barrier or even as a shelf in the middle of a room. The straps gave it a trendy and versatile look – 2 schemes are possible in stimulating colors! Your kids will love this idea! Strap it!