Origami is a little tricky for them because they don't have the dexterity, but with a little help they made origami bookmarks and christmas trees as an activity. They had fun with it. Folded Paper Heart Book Page Marker – DIY
DIY Cat Bookmark Tutorial from One Artsy Mama. Since you are using soft wire this should be quite easy to bend and hammer depending on the look you want. Also, you can make a smaller version for a necklace. For one of the best DIY Wire archives go.