More to explore:
make the world in a pop bottle! use 2 liter bottles and stuff you can find in the woods. ours is still working a month later! - i remember doing this in elementary school!
Make a world in a soda bottle. Mini ecosystem.
- soda bottle terrarium (need 2 soda bottles & duct tape, along with gravel, soil, plant...)
Make your own eco system
Great summer activity!