This origami shirt is a little tricky to fold, but it's worth persevering because it looks great. You could make it with plain paper and add your own decorations, or find a nice stripe or check for a different effect.
You could use this model on the front of a card (perfect for a birthday or Father's Day). Perhaps you could colour and decorate it to match your favorite team's sports kit or strip? Make a whole football team and reposition your players as much as you like .. you could even stick magnets on the back and use them on the fridge or a magnetic white board.
Having a party? How about writing your guests names on the shirts and using them as invitations? Use the origami shirt for boys and the origami blouse for girls. They would make fun name badges or place names, too.