The zig zag can's a nice collection item. If you go for a well made wooden model, it should hold it's value well.
Its no great fooler though. It might work for kids, but it is hard to think of a way of routining it with other effects.
i can make your wife disapear but that costs extra, thats what i usualy say to that old chestnut.
disected coke can wont fool many if todays generation of kids I'm afraid some of the classics like the change bag still fool them and die boxes which also make great colectors items due to there variantions on the theme, the best one i have found is the disection based on rocky the racoon, your animated buddy, most kids know how he works so cant get the head round stiking a blade through the workings.