We have these almost every day, eaten on the porch 'cause they're messy, looking out at the flowers in the yard. Delicious!
Fill ice pop molds with 60-70% water, add juice until full.
I do orange for the kids, grapefruit or pomegranate (This is intense and takes getting used to) for the adults. Last summer I mixed pomegranate and blueberry, which made a gorgeous purple color but stained my teeth gray.
Even the kids who are used to junk food love them; no one's ever said they're not sweet enough. (I think molds shaped like rockets help)