Hug a Tree
Teach respect for the earth.
Never litter. Even if something drops by mistake, make a point to pick it up. And if you see an old newspaper or a used coffee cup left on a park bench, throw it away. It feels good to take care of a mess you didn't make and weren't "supposed" to clean up.
How's this for a double whammy of doing good? Have your child collect and take empty cans and bottles to a recycling center that pays you for what you bring in, then drop the money you make into the donation jar at the supermarket checkout.