One of the funniest stories about squirrels that I've heard involves one of my friends. Years ago when she was getting married, her mother decided to make her bouquet as well as some of the flower arrangements. It was a spring wedding so, in the fall, her mom planted hundreds of bulbs intending to use them in the bouquet and arrangements. Squirrels started digging up the bulbs and her mom freaked, so her dad came up with a plan. He set out humane traps, and when he caught a squirrel, he would load the cage into his car, drive to a nearby parking lot, and drive the car round and round in circles, thinking he was confusing the squirrels and that they wouldn't be able to find their way back to his yard, and then he let them out. The squirrels proved to be smarter than he was! Fortunately, enough of the bulbs came up in the spring that there were plenty for the wedding.
We feed the squirrels in our yard. We put out ears of field corn, peanuts (which the Blue Jays love too) and a wildlife trail mix. The peanuts go in a metal box that's attached to one of the trees, and the squirrels learn how to open the lid to get to the peanuts. They really are smart little creatures!