For many years, I have saved eggshells to give to the birds. Eggshells are a good source of calcium, which they need for their bones and to help their eggs have a stronger shell. When I'm cooking with eggs, I place the eggshell back in the carton and save it until they've all been used. Then, I place them on a piece of foil and put them in my toaster oven at about 350 degrees. I bake them for only a few minutes, until they are slightly browned. Be careful not to overcook. Then, I put them in this wrought iron basket and the birds and the squirrels, and not sure who else, love pecking and eating them. Maybe the squirrels are eating the part of the egg white that is still in them. And, there are lots of bugs on the eggs for the birds and squirrels. If you don't want to bother with hanging them in a tree, you can crumble and place them on the ground in your flower beds and any place that is easy for the birds to find. By the way, I buy organic cage free eggs. I'm sad for the chickens that are kept in small cages. (Original post July 8, 2012)