Ideas for Nature Themed Campaign for Kids!

Hello all! I work at a nature center that hosts summer camps, and one week's theme is Legends and Lore. I thought it would be a fun idea to hold a mini interactive campaign for the kids during the week. I'm still pretty new to DnD so quite frankly I have no idea where to start. If anyone can give suggestions that would be awesome. 

A few important notes:

*I will have about 10 kids in my group, with 1-2 high schoolers assisting me with the kids as Jr counselors 

*The kids will be entering kindergarten/1st grade

*My idea is to have each "session" be about 30-45 minutes over the course of the 5 day camp week, since their attention spans may be short and so we have time for other activities. The goal is to do this out on the trails so they're out in nature and moving their bodies.

*I'd also like it to be somewhat "educational" where they can use knowledge of different plants and animals to solve problems and work together

*I know DnD is combat heavy, but I don't know the policy on pretend battles or anything. So maybe more puzzle/problem solving than combat. Maybe a few mini battles but kid appropriate of course. 

I know this is a big ask, but any ideas, resources, feedback etc are appreciated! Thank you for reading this far, and have a great day!