Kim has some good ideas for items….
I probably should have posted to the other link but a post is a post. The Dollar Tree or 99 cent store is a great place to find tactile little tsotkes and if you can take the time to wash them, things at garage sales work as well. Just make sure that you sterlize them!
Also, make sure they aren't TOO small that kids can't put them in their mouths. Er, and make sure there isn't any lead in it either… I think that covers it. Thanks again for the shout out for my book, “Your Daughter Has Been Diagnosed With Rett Syndrome” a few months back. Good luck with your career and definitely don't go broke!