STEM education has been spreading all over the world.Research and policy indicates that students should be engaged in STEM courses from kindergarten.The pilot project for science education reform of China, Learning by Doing, has published a range of STEM modules.During the developing and implementing of these modules, problems typically met by K-2 students were recognized and dealt with.Young children are often short of experience of the engineering products, materials and process, and they are likely to present too much or too little imagination.In the instruction, opportunities for children to develop their understanding of what theyll use and design, as well as what engineers work looks like, is key to solve these problems.Besides, these opportunities also offer a natural way to appreciate the connection between STEM fields.Other teaching strategies, e.g.,introducing contexts and brainstorming, support children to fully participate in STEM activities too.A Learning by Doing module, My little boat, is involved to illustrate these problems and solutions.This effort is expected to contribute to the future development and practice of STEM education.