At your grocery store, pick up your favorite brand of yogurt cups. My kids prefer Trix yogurt, which comes in little, plastic, 4 ounce cups.
Take the cup of yogurt
and make a small slice in the foil with a knife.
Insert a plastic spoon/knife/fork.
Unless your kids eat quickly, these can become a bit drippy and messy. My kids get to eat them outside so I can hose down whatever remnants hit the floor.
They're cold and yummy and healthier than sugar-in-a-tube (a.k.a. ice pops).
P.S. I also freeze Go-Gurts. Those are great for beach days...I can throw a whole box of those in the cooler and by the time the kids are ready to eat them, they're still cold, but softened just enough to make them easy to open and eat.
P.P.S. I assume an adult might like these, too....if that adult was a fan of yogurt. I am not. Yogurt is on my list of Icky Foods That I Choose Not To Consume.
Edited to add: I was not, in any way, compensated by the companies for this post. This was not meant to be a "review" or advertisement of any product in particular. These are simply the brands that I use because the OMG How Much Did I Spend?! grocery store carries them.