Cooked Spaghetti has a unique feel to it — when J saw what T was playing with he announced it was slimy worms so I cooked up some Spaghetti and the split the quantity in half and dyed half with blue food colouring and a little oil and the other half with green food colouring and a little oil (the reason I have done this is for a few more activities that I have planned that those colours would form a great combination for). (rainydaymum.co.uk)
While the chocolate is setting, mix the butter with the icing sugar and a few drops of green food colouring. (bbcgoodfood.com)
then instead of chemical laden green food colouring — eeks! (robinskey.com)