Jell-o is a wiggly, jiggly, colorful food that you can eat! It's made from a special powder that you mix with water and sugar, and then put in the fridge to cool down.
The powder is made from a type of molecule called gelatin, which is a protein that comes from animals like pigs and cows. When you mix it with water and sugar, it turns into a liquid that you can pour into a special mold or dish.
As it cools, the gelatin molecules start to stick together and form a solid, wobbly mass. When you take it out of the fridge and wiggle it, it jiggles because the gelatin is like a bunch of little springs that bounce around.
You can eat it plain or add fruit, whipped cream, or other yummy things to make it even better! It's a fun and tasty treat that lots of people love.