Lava Lamp in a Bag

This lava lamp in a bag is the perfect activity for kids on a day when it is either too cold or hot to play outside. With only 3 ingredients that you can find very easily, this activity can be put together quickly and provides lots of entertainment and even some educational value.

If you want to add it to science unit you can talk about the different densities of water and oil and how like molecules are attracted to each other. Or you can just let them play with the bag and watch their delight as they form different patterns merely by pressing down on the bag.