My kids love collected things outside. They usually come home from the park with several rocks in their pockets and a whole bunch of sticks and pine-cones in my bag. I'm not sure how they sneak all of that nature in my bag, but somehow I'm constantly reaching in and discovering some kind of flora when all I really want to get is my wallet or a diaper. The other day I gave them the job of collecting leaves around our neighborhood. It's still a little early in the year for colorful leaves, but we did find a few that had already changed. We took them home, laminated them, and then hot-glued some magnets to the back. I stuck the leaves to our dishwasher (since our refrigerator is already full of letter magnets) and they were a hit right away. It's been a fun thing for the kids to play with while I make dinner.