I altered one of those miniature lunch boxes to make a little case for some crayons and stamped panels for kids to color that they could take on vacation, or on long rides - or you could have for them when they visit at your house to keep them entertained!
This pic shows the front outside panel.
I got the container in the dollar bin at Target last year and I think Michaels might have them sometimes too. Dollar stores sometimes have them as well.