Children follow them at every stage of their development with curious eyes and as they grow older, they try to learn by asking them everything they don't know. The pre-school boy is very curious and interested in his surroundings.Children are more prepared to develop their scientific processes than to learn abstract concepts. Therefore, it is very important to teach science concepts and scientific skills to children who are educated with appropriate methods and techniques in preschool institutions. Project-based education is an appropriate method for improving the level of Science achievement and scientific processes of preschool children.