■Place the cooled boiled egg on top of the glass bottle, making sure there is no way the egg fits through. Ask an adult to light two matches and drop them inside the glass jar, quickly place the egg back on top. ■Watch as the egg drops inside the jar.
This super easy salt water experiment is the perfect science activity to teach kids about the density of salt and fresh water. Great for an ocean unit or a hands-on science activity for preschool, kindergarten and first grade!