One hobby I recommend is F.I.R.S.T. It is an international robotics competition for high school aged students. It is heavily stem focused, but not exclusively. The kit of parts itself is ~$6k and encourages/requires students to raise money. This is a good way to incorporate the business focused students to generate marketing campaigns to raise funds. Also these robots require machining to assemble. This helps bring on shop students who like working with their hands welding, cutting, machining and the like. FIRST helps students learn how a business organization works where everyone has different skills and rely on each other. There’s also scholarships and career opportunities afterwards. Companies like Boeing, NASA, Raytheon, General Dynamics are just a few. Again this is an international competition. Try to find a team near you or start one at the high school. If the student isn’t in high school, FIRST has other competitions for elementary and middle schools that do similar things, on a smaller scale.