Yes, acorns. We plan to eat them!
Today after getting home from work, my husband and I collected 4 pounds of white oak acorns from our front lawn. Well we collected more like 8 pounds, but discarded half due to insect damage and/or sprouting.
Our booty:

All 8 pounds were gleaned from casually picking up a few nuts here and there under about a quarter of our one white oak tree's canopy. Ol' Bessie is producing a bumper crop this year - there will be plenty left over for the squirrels. Though I think I need to come up with a better tree name than "Ol' Bessie" - any suggestions?
The good nuts are drying in the oven AS I TYPE and I'm pretty darn excited about it. Maybe I'll make some acorn burgers. I'm dreaming big.
To learn more about harvesting, preparing, and eating acorns, check out this website.