If your kids don't like peas, maybe it's just because they haven't had them in frozen popsicle form. Weelicious shares a recipe for Peas In a Pop, a popsicle made of frozen peas and water. Apparently kids go crazy for them.
Curious to see what other pea-centric popsicle recipes exist, I came across Minty Pea Pops (also made of cream cheese, chocolate chips, and sugar) from The Toddler Cafe by Jennifer Carden. The recipe says that they taste like like mint chocolate chip ice cream.