All you need is an egg, a cup of vinegar and some patience.
You can see the chemical reaction that takes place, starting almost instantly.
Leave the egg in the vinegar for a couple of days and you'll be left with an egg with no shell. I had to gently wash all the egg shell residue off before we could really see what it looked like.
The egg feels all rubbery, a bit like a water bomb and it's a lot bigger than when we first put it in the vinegar. Riley was quite hesitant about holding it as he didn't want it to break, but loved gently touching it and seeing what it felt like.
Joining in here.