Shopping bags don't have to be bland. They can be clever, surprising, and interesting.
Here are two examples :-
"This shopping bag shows a 10 pound dumbbell (printed on both sides). They're given away to customers when purchasing fitness accessories or nutritional supplements at the Fitness Company fitness centers."
"Here's a clever Wheaties bag that will either inspire you to get in shape, or inspire you to carry a bag in front of you wherever you go."
Go here to see the others :-
(Parental guidance might be needed.)