How To Make Rubber Eggs 🥚 ages 3 🥚 Here’s a super fun science experiment you can do at home and all you need is a jar, a raw egg, vinegar and food coloring! 💥 WHAT TO DO 👉 Start by placing a raw egg in a jar and covering it with vinegar. Then store the egg in the refrigerator for 3 days. Then rinse the egg gently under warm water and rub the remnants of the shell off to reveal the brightly colored egg. You’ll notice the egg can be gently squeezed without breaking and feels like a rubber egg!