What do you call that thing that Sandra used to scratch her head?
It's looks like an octopus with 5 legs and it's made of metal. You put it over your head and stimulte your head.
What do you call it, and where can I buy it?
It's called a tingler. And here's a list of places you can buy one:
http://tinglers.com/
http://www.sitincomfort.com/tingler.html
http://www.drugstore.com/products/prod.asp?pid=70678&catid=10472&aid=336064&aparam=xsp80938
http://wishingfish.com/tingler.html
http://www.opamerica.com/product_info.php/products_id/185
sweet