Sounds like a great activity! Two thoughts:
(1) Beware of recipes that add sweeteners (honey, agave, etc.). If you add sweeteners, they become less healthful.
(2) Related language trivia: People are losing the distinction between the words healthy and healthful.
Healthy means "in good health," as in "Having recovered from my illness, I am now healthy again."
Healthful means "promoting good health," as in "healthful sleep" or "a healthful diet."
I look forward to making -- and eating -- the healthful ice pops!