-sweetened condensed milk
-natural food colouring
Pour the can of sweetened condensed milk into a saucepan.
Add 1 tablespoon of corn-starch to the condensed milk. Turn the heat on low and simmer the mixture. Stirring constantly!
Remove the mixture from the heat when it has thickened. Add the food colouring. Add as much as you need to reach your desired colour.
Let the slime cool. Once it has cooled, you can play with (or eat) it.
Keep in mind that it might stain lighter coloured clothes or carpets