I was blog surfing and saw a craft called Rainbow in a bag over at Artful Parenting, which is a super cool blog.
Mix in a pot....
1 cup cornstarch
4 cups cold water
Heat stirring constantly.
Once it starts to thicken - remove from heat - it will resemble wall paper paste initially but as it cools, is more like Vaseline.
Divide between as many bowls as you have colours (food colouring). Add some food colouring to each bowl and mix. I chose primary colours only.
When it has cooled (I couldn't wait that long), scoop some of 2 or more of your goop into a ziploc bag (or similar - my eco conscience was able to justify using the bags as it's in the interest of education!!!).
Is it odd that I am having so much fun with these and T2 is napping??? She'll love trying them out when she wakes up!