Egg Yolk Slime-Filled Plastic Easter Eggs contain slime that looks like an egg. Forget stuffing your eggs - ooey and gooey. These pre-filled Easter eggs are sure to please. Add them to your Easter egg hunt or put them in Easter baskets for kids to play with. Slime-filled Easter eggs are made from plastic. Size: 2 1/2-inch. One Slimy Egg (in clear egg shell)!