This is our 3rd season in business together. Me & my partner do mowing & landscaping. My partner was mowing & I was landscaping 2-3 yrs before (self-employeed). Decided to combine, & so far, really good. We're swamped with work. Customers all wanted both services so made sense. Now were so backlogged need to hire help. I've got a kid (17 yrs old) son of a friend who has used all of the equipment that we use. (Parent's actually sold us their 48" walk behind, because they bought a new z-turn rider.) He is unusually responsible for that age and has knowledge of all of the equipment. I called our insurer today about workman's comp and thought I'd had it covered. But now I'm wondering, he's under 18??? Maybe, I should just have him landscape and not mow. What to do?? Help!