Instead of throwing out your old computer, you might want to consider upcycling it a la the iMac Pet Bed. This crafty pet bed was created by Etsy merchant Atomic Attic and is made using a real iMac. Atomic Attic did a complete upcycle, even turning the speakers into a brace for the back of the bed.
With the rapid development rate of technology, it's not unusual to purchase a new computer or laptop once every year or two. That being said, the rapid development rate of technology is also creating an e-waste problem of unprecedented size. The iMac Pet Bed is a great example of how old tech can still serve a purpose. The pet bed sells for $129.00 and is available now.