For Christmas a few years back my mom bought me this popsicle maker from Williams Sonoma. I LOVE it. And was very excited to break it back out when the kids were sick this month.
The kids and I juiced a carrot, apple and two small oranges. You pour whatever juice you choose into this popsicle base, insert the sticks provided and in 9 minutes you have popsicles.
The kids are really excited to make juice anyway then to make popsicles with it - its a win-win. Next I'm going to try juicing green apples and spinach and see if they will eat it as a popsicle.