Include funnels, muffin tins, and measuring spoons and remember metal gives more feedback to your child. Hair curlers with prickles stick to a variety of textures along with hair. Many young children need encouragement to feel different textures. Some textures are less offensive if put inside a zip-lock bag. Try hiding their favorite food, such as raisins or grapes in Cool Whip or cereal.
Clothespins are great for developing fine motor skills.
They build finger strength for brailler use and writing activities. Make up a game with them by pinning them on clothes, paper, etc. and having your child take them off and put them in a bucket. It is a harder skill to pin them back on to an object, but some children will learn to do so. The hardware store is another great place to find inexpensive gadgets for kids such as keys on a key ring, nuts and bolts, different size paintbrushes, and tools. Nail aprons are handy for sorting activities.