I recently made a "feeley" box out of an old shoe box. I cut a small hole in the side and added a piece of felt so the kids could not see in. It has been a huge hit. Today, I hid zoo animals in it and one by one they pulled them out. I have them feel it first before they pull the object out to see if they can feel what it is, without looking. They just love it. Great sensory activity. You can use just about anything and everything.