Thêm vài giọt màu thực phẩm (nếu cần). Để hỗn hợp nghỉ trong 1 tiếng. Cho slime vào hộp hoặc túi kín khí.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Food coloring is optional, but it may make the slime more fun! This will allow the mixture to reach the desired consistency. This slime keeps very well in an airtight container. Make sure you store it away from direct sunlight and heat.