They also have the stubbly little screw drivers that are about 50 cents each and are great for your sewing machines. I bought one for each machine. They are better than the ones that come with the machines. (Harbor Freight)
I also buy water color paint brushes in the toy section. They have nice long handles to really get in there to clean with. And they are so cheap that you don't mind throwing them away when they get really yucky. You get several in a package for less than a dollar. (At WalMart)