Origami Club is a huge site where kids can learn more about the wonderful art of paper folding. There are easy creations for younger kids like this simple cat, which has instructions in both diagram and animation.
Following these instructions to make their chosen creation will give kids great practice in visual literacy. Why not let them choose several clothes to dress a character, and then describe it in words? Or try out different paper planes for distance or aerobatics, then record the details of their experiment? Or create sea creatures for a wall mural that displays their poems about the sea?
Another fun origami site is Tammy Yee's Origami Page. Tammy shares her own art work. You print out her illustrations and follow directions to fold them, like with this swallowtail butterfly.
For folding according to two themes, try this museum site where Michael Fosse shows the folds to create several origami models on video. Kids click on the model they would like to try, in themes of Polar Origami, and Origami Now (bat, frog, duck etc).
If you'd like your kids to see some inspirational folding, check out this short video below. It's in German, but you don't need to know the language to understand what's happening. It might give your kids an idea for a narrative of their own.
Papierkrieg from Makaio Tisu on Vimeo.
Art can give kids a focus for their writing, and tap into that deep well of creativity that lies within us all.