(Make sure you use contact lens solution, NOT saline) Give it a poke, you'll know its ready when it looks and feels like slime! Let us know how you get along with your own slime in the comments below.
Try making other samples of slime with different amounts of water and compare them to your first piece of slime. In each sample, follow the instructions to make the slime that you followed before, but ...
Heat your cream and butter in the microwave, or in a pan on a low heat. (Be careful when using hot appliances, make sure you get a grown up to help you!) Once hot, stir in the dark and milk ...