Cutting with scissors is a learned activity. By three years old your child should have no problem holding a pair of child-sized scissors. It takes them awhile to master this new skill, however, so be patient with them while they begin to show an interest in learning how to do it.
When we go camping each summer, we like to stop at a favorite local fruit stand and buy a 20-lb box of fresh peaches. After enjoying some delicious peach milkshakes and making some peach jam, I decided to freeze the extra peaches.