"Whoa. $160 initial investment for seventy cents a day profit? Your kid is investing at 160%!" -- It's rather easy to earn that return on capital if you have f

"Whoa. $160 initial investment for seventy cents a day profit? Your kid is investing at 160%!" -- It's rather easy to earn that return on capital if you have free labor. For example: plant a garden in an unused plot of land* for a few dollars' worth of seeds, compost, and depreciation on your tools: get tomatoes and beans and cucumbers and strawberries. Of course, you'll also need to till it, plant it, weed it, and all sorts of other stuff... So if that's your idea of cheap fun, go for it, but I wouldn't go so far as to pay anyone else to manage it. (Herbs are probably the simplest option. It's usually expensive to buy them fresh, and they are dense and simple to take care of.) (* Also, land is much easier to come by in places which are not California, and hey often get real rain during the summer.)