I collected lots of different objects of different textures, including foam shapes, cotton balls, bits of sandpaper, beads, toothpicks, rubber bands, aluminum foil, googly eyes, pipe cleaners, etc., and put them in this container for O.
Then I taped a piece of contact paper sticky side out on the glass door. O has had a great time sticking different objects on the contact paper. She especially loves the foam shapes and cotton balls. She thought it was "cool" that she put the cotton balls on the paper, and some of it stayed when she pulled the cotton ball off the paper. She also stuck a couple of balloons on the collage. I intended for her to put use deflated balloons, but she insisted that I blow them up. I was surprised that they stuck to the collage, but she didn't leave them up for long :)
O has enjoyed working on this texture collage so much that I've left it up on the door. I think I may switch it out for new contact paper once a week, so it can be her ongoing art project :) Next time I think I'll give her a selection of construction paper cut into various shapes or tissue paper to tear into bits (we have tons since I save it from all birthday parties. Yes, most people think I'm crazy, but I don't mind.)