DIY web site Instructables steps through how to build a laptop stand for your supine computing needs for about $15. Once you've bought all the necessary materials, the actual stand won't take more than about 30 minutes to put together, and the end product is virtually the same as the $140 Laptop Laidback stand pictured here.

Source- http://lifehacker.com/357091/diy-laptop-stand-for-the-bed