Rader's Biology 4 Kids is an excellent website for anyone (even big kids) who wants to find out about basic biological principles. The simple to use site contains information and clear graphics on topics like cell structure, cell function, scientific studies, plants, vertebrates, invertebrates, and other life science topics. The information is presented in a tour format, which is extremely easy to use and follow. There are also a series of quizzes to complete, to test your learning, as well as relevant links to Rader's other excellent websites including Chem 4 Kids, Physics 4 Kids & Geography 4 Kids. Go check it out!