Building kits are sets of materials and instructions designed to help individuals create specific structures or models. These kits often include components like plastic or wooden pieces, tools, and detailed guides to assist users in assembling their projects. They can range from simple toys to complex models, catering to various age groups and skill levels. Many building kits focus on themes such as architecture, vehicles, or robots, encouraging creativity and problem-solving. Popular brands like LEGO and K'NEX offer a wide variety of kits that promote hands-on learning and can be enjoyed individually or in groups.