Mix 1/2 cup shampoo with 1/4 cup cornstarch
Stir until it becomes thick and sticky
Add a little more cornstarch if needed
Knead the mixture with your hands until it forms slime
Chill it in the fridge for 10 to 15 minutes if it is too soft
Use hand soap instead of shampoo for a similar result
Mix 1/2 cup hand soap with cornstarch a little at a time
Stir and knead until the texture becomes stretchy and slime-like
Add food coloring if desired
Store the slime in an airtight container when not in use