Assign each colour sweet a category, for example:
Green: the environment/animals
Yellow: the world
(N.B. Change the colour code to fit the colours of the sweets you use.)
Open the packet of sweets and take it in turns to pick one. (You could do this eyes open or closed to make it more tricky.)
When you have your sweet, before you eat it, say a one line prayer thanking God for something in that category or asking God to help or do something for someone or something in that category.
Eat your sweet as the next person takes theirs.