This colorful and adorable helicopter is assembled with nuts and bolts! When you hold the finished product in your hands, you'll feel the solid weight and solidity that only metal can provide, creating a truly special sense of accomplishment. It's available in four colors: blue, purple, green, and orange. By rearranging the parts and combining them with additional parts, you can create countless original blocks, limited only by your imagination. The propellers can be rotated, making them a fun, dynamic display piece. The O Blocks are metal construction blocks. The blocks come in various shapes, including straight, L-shaped, U-shaped, and key-shaped. To use, simply pinch the bolts and nuts to connect the parts, then tighten them with a hex wrench. With parts that look just like real metal parts, you can create anything from a cute bicycle to a giant monster. Instead of finishing the build once, you can disassemble and reassemble them over and over again, allowing you to express your creativity however you like. [Material] Aluminum [Finished Product Size] Finished Product Size: Height 70mm, Width 58mm, Depth 72mm, Weight: 151g [Package Contents] Block parts, bolts & nuts, hex wrench (2.5mm), instructions