In the backyard he chucks walnuts over the fence into the (vacant) neighbor's backyard. The nuts are from their tree, so he doesn't feel bad about ridding our yard of the massive amounts of greenish balls that land in our yard each autumn.
My two year old follows his daddy around the yard, tossing the spheres a few inches in the air with enthusiasm. When his efforts don't make it over the fence, with an enormous grin he gives it to bigger, more capable hands . And they walk around the perimeter, holding sticks and kicking leaves, in a daddy-son rhythm that makes me hold my breath and wish to keep them both like this forever.