Using this K'NEX set is easy! First, pick a model from the 50 options in the instructions. Then, follow the step - by - step color - coded guide. Find the right rods and connectors and start building one piece at a time. Some models have online - only instructions, so make sure you have access to the internet for those. When you're done building, handle your creation gently to avoid it falling apart. If you want to build a new model, carefully take apart the old one and store the pieces in a safe place. Keep the set away from small children who might put the parts in their mouths. And remember, the more you build, the better you'll get at creating awesome K'NEX masterpieces!