My friend, who lives with me, got a can of Silly String for Christmas as a gag gift. I found out, by accident, that Missy is just terrified of this stuff. So whenever I see her getting ready to crawl into Sprout's tank, PSSSST! I blast her with Silly String.
The best cat toy you can get is a Chinese yo-yo or a long feather boa on the end of a long stick. A cat can grab the toy without getting close enough to grab you.