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!

You can use inspiration from D&D but do not try to actually play D&D in that situation. Some ideas:

• use cardboard & paint to make a "river of lava" that they have to build a bridge to cross,
• hide a scroll up a tree they have to find a way to knock down,
• get them little nets and hide some toy fairies around in bushes that they have to go catch with their nets before they perform some mischief - maybe the fairies like a certain type of bush / tree so they learn about that bush/tree at the same time,
• buy some plastic gold coins and make some fake animal tracks, and tell them the baddy escaped with the gold on [insert animal] so they need to follow the foot prints to hunt him down / find all the gold.
• have someone dress up as an NPC that lives in a [insert tree species] and take the kids on a hike to try to find the right type of tree where the NPC is hiding to give them a clue for the next day.