keep shells in open container in fridge. When full, crush shells into small bits and sprinkle around base of plants. Sharp eggshells will deter slugs, snails, and other bugs from nibbling on garden and add touch of calcium to soil.
NATURAL ANT KILLER: Mix two tablespoons of borax with jam, jelly, honey or syrup until there is a paste. Smear some on some paper or a plate and put it where the ants are at. They should flock to it and eat it and take it back to the nest.