The Milkshake Challenge

Take 4 children.
Get 20 different food types, some nice, some less nice.
Get said children to randomly pick 5 ingredients each, out of a bowl, where the ingredients are written down.
Blend the ingredients with milk.
This is the faces of the children before they drank their disgusting drinks (the one with Wotsits and Cheese strings was probably the worst).
I would recommend this if you want lots of giggling and declarations of 'Oh my gosh, that is gross'