If you're looking to play a trick on a friend or simply get bored with your desktop, you might be interested in installing 12 Ants. It is nothing more than a fun novelty for Windows which lets several ants loose on your screen which will possibly give you the itches!
This application is freeware and portable, so perfect if you want to carry it around on your USB stick and would like to play a trick on your buddies.
Several fixes for this program have been introduced due to bugs with Windows Vista and Windows 7.
From Nenad Hrg:12-Ants or more for your desktop. Itching is not excluded. Watching the little rascals and have fun.12-Ants does not have to be installed and can be executed easily from the desktop, and can be carried on a small usb-stick or other memory device.12 Ants 2.33
is licensed as Freeware
for the Windows operating system / platform without restrictions. 12 Ants is available to all software users as a free download (Freeware).
12 Ants Virus and Malware Tests:
For security reasons, you should also check out the 12 Ants virus and malware test
that has been uploaded; additional 12 Ants screenshots may be available, too.