With the school holidays still upon us we have been doing lots of crafty things, but this has been the hugest hit (with both of us LOL).
Basically you take one cup of cornflour, then add any food colouring you like, and slowly add in water. When it mixes well together - you have slime.
The thing I love about it is that it is gooey and dry at the same time. You cant really make too much of a mess with it as it holds its shape, but Little B will spend a good hour playing with it. It sort of melts in your hand and you can even cause a drip, but it still stays together kind of firm.
Aaah the joys of cornflour!!