What You'll Need
-1 cup cornflour
-1/4 cup water
-3 drops food colouring (if you can, go for green)
-1 snap lock plastic bag

What to Do
1. Pour the cornflour into the plastic bag, and slowly add the water mixed with food colouring.
2. Gently press the air out of the bag and close it.
3. Knead the bag until the mixture is smooth, then go outside and get sliming!