Hi Dena,
I would also recommend doing some research. I know people swear by it, but if your kids are pretty good about eating fruits and veggies, they don't really need a supplement like this. Especially the gummies - they're 80% corn syrup! To me, that's not healthy even if there are some vitamins in the remaining 20%. The original study that the Juice+ website touts was small and pretty flawed, and you can find more details about that online.
Most research shows that vitamins and supplements make little to no difference in people with reasonably healthy diets. You can stuff as many vitamins and minerals into a pill as you want, but that doesn't guarantee that they will metabolize the same way or be as helpful as those vitamins and minerals when consumed via real food.
Juice Plus won't hurt you (except maybe all the corn syrup in the gummies), but it's expensive and isn't scientifically proven to help.