It's great fun for any dog/pet!
Step 1: Materials
-1 class IIIA or below Laser (you can pick one up at RadioShack)
-1 plastic cd/dvd drive (or other suitable body with properly sized holes)
-And of course Laser Safety Goggles rated for your laser's bandwidth
Step 2: Laser Safety
Never shine a laser directly into your eyes as this presents risk for permanent retina damage.
Some medications may increase this risk.
Brief exposure to the beam from a class IIIA or lower laser will not likely result in permanent damage.
Use laser safety goggles rated for your laser's bandwidth.
Make sure that all lab participants wear there protective eyewear!
Step 3: Connect the Laser to the Plastic CD Drive
The cd drive I used had holes that were perfectly sized to allow the laser to fit snugly. Depending on the diameters of your cd drive and laser this step may be very easy or may require additional steps/materials.
Step 4: Wrap Rubberband Tightly Around Laser
Step 5: Attach to Fan
Using the clips, attach what you have so far in some way to an overhead fan. You may have to use additional clips or rubberbands.
Step 6: Test It Out
Now you've got a functional spinning laser toy for your pet!
Here's my test