Using these MAKEDO Scru Scru - Driver top - up packs is a breeze. First, pick the right Scru size (75 x Scru, 50 x Scru XL, or 5 x Scru - Driver) according to your project needs. If you're starting out, the MAKEDO Cardboard Construction Toolkit will give you a good base. Then, use the Scru and Scru - Driver to connect pieces of cardboard. You can let your imagination run wild and build anything from a small flower to a big fort. When it comes to maintenance, keep the Scru and Scru - Driver in a dry place to prevent rust. And make sure to store them safely so they don't get lost. Also, be careful when using the tools, especially if kids are involved. Always supervise younger users to avoid any accidents.