The "Savanturiers-School of Research" initiative is a French nationwide educational program that aims to introduce investigative approaches into schools through the creation of science projects. During the course of several Savanturiers projects, primary school pupils struggled with program design, among other difficulties, and we felt the need for methodical, technical and human support. In a computer science degree, the capstone project offers students the possibility of a "learning by doing" approach to software development, from the requirements to the product qualification. To overcome the difficulties mentioned, we have mobilized Bachelor of Computer Science students by giving them the classes involved in the Savanturiers projects as "clients" for their capstone projects. This has reduced the technical scope of the capstone projects but has increased their social utility. Although some Bachelor students did not take advantage of this situation, it was a positive endeavor as attested by the student feedback.