The landscape of robotics platforms for education is broad and mainly focused on technical problem solving skills. The different application areas serve for adding some variety regarding skill sets and areas of interest, however design or product development skills are often neglected. Mattie is a simple robotic platform for children to realize their first robotic product ideas. The design is kept very simple. Materials are affordable and easily available. The aim is to guide children to build their first robot prototype from scratch by learning product development and scientific working. The concept around the Mattie robot incorporates different perspectives like product, behavior, marketing or design besides technology and engineering. This way, robotics can appeal to those children who are not interested in engineering or programming right away. We have successfully used the Mattie robot in classroom workshop settings with seven different classes (6th, 7th and 9th grades). The feedback from teachers and students aged 11-18 is very positive.