I can easily see myself setting my kids up with something like that to teach them the value of time, structure, and work. It's no different to me than buying them a chemistry set, an Arduino, or making baking soda/vinegar volcanoes with them. I can even work through the math with them to show them that what they did was more expensive than me just handing them $5000 and telling them to watch TV all summer to save wear and tear on the car.