Depending on the size of the paper you use, this origami card holder can hold either business cards or credit cards prety nicely. It is a simple yet very practical origami. Find out how to fold the origami card holder here.
Origami Business Card Holder: Using bigger paper (paper off of rolls for bulletin boards) students could create portfolios with 4 pockets. Could make more than one, bind like a book, and have a great art journal!