Do you actually know how to make candy? You ask this question to the crowd of children who are eagerly awaiting the next piece of art. As soon as someone calls out sugar, bring out a clear cup full of sugar. Show it's real sugar by picking up a pinch and letting it trickle back.
Then pour some food coloring or powdered paint into the mug and cover it with a decorative tube. A little magic is enough and the cup is already filled to the brim with Smarties, sweets, etc., which you can give out to the children.
You will receive cup, tube and German instructions.
You only have to buy sweets and sugar yourself.