- Food colouring
- Large bowl
- Pour 1 cup of cornstarch into the large bowl. Feeling this texture can be fun for children!
- Slowly add about 1/2 cup of water to the cornstarch– add enough so the mixture has a gooey feel to it. Children can mix this with their fingers to feel the fun gooey texture!
- And just like that, your oobleck is ready! If you want, you can add food colouring to create a fun colour
- Now children can explore it, play with it, and form it into different shapes to see what happens!
Why does it happen?
- The oobleck you just made is a special because it doesn’t act like a typical liquid or solid
- The mixture creates a fluid that acts like quick sand: applying force (squeezing or tapping it) causes it to become thicker but dipping your hand in the mix feels like water
- This type of substance is known as a non-Newtonian liquid (from Sir Isaac Newton)
- This substance's funny name comes from a Dr. Seuss book called Bartholomew and the Oobleck