I thought I would add links for the nubby ball and the bathtub that I wrote about below(click on the words below to go to coresponding website)
And here is a close-up on the rainstick
The last toy we recently purchased (VERY cheap on Eb@y) was a nubby ball. I can't remember quite what words I used to search for this ball(maybe 'special needs bumpy ball'??), but it was less than 4 dollars-including shipping. And the company that sells these employs visually impaired individuals in Florida, so I felt especially good about my purchase. It has lots of 'nubs' on it so that Matthew gets lots of sensory stimulation touching it. Matthew does lots of sensory issues, so this helps with his hands a lot. I also roll it along his arms and legs, too. This ball, along with lots of infant massage, has helped 'desensitize' him, so to speak. Everytime we go to the hospital, he gets lots of 'negative touch' from all the procedures, blood draws, etc. that they do, so when we come home, I always have to work with him extra hard for a couple weeks to trust touch again. This last visit set him back especially and right now he still cries everytime I pick him up :( That is one reason I am SOO diligent about doing as few procedures as needed when he is in the hospital. We pay for it when we go home.
Finally, one other item that has been helping are Matthew's hand splints. His therapist ordered them for him and they help keep his thumbs out and not in a clenched position. They are called neoprene splints and they are made by Benik. He wears them mainly when he sleeps and then about 1/2 of the day. They are oh so cute on him!