Heres one for teh win.
Go to C:\\WINDOWS Find a file names Clock. Open it in WMP and turn it on loop and make WMP as small as you can and drag it off screen. Turn up the volume all the way or just slightly so it only annoys her and she goes nuts.
Put it so when you start up the computer it autoruns it.
http://www.mdgx.com/newtip14.htm#HW9XD
Hide the drives from My Computer