If your young child is showing an interest in learning computers, an introduction to Scratch and these instructional videos by Al Sweigart might be in order.
The Screening Room
Talented book author Al Sweigart is a name familiar to many in the FOSS community. He writes books for kids and for adults — including the recently released Scratch Playground. Scratch is a free visual programming language developed at MIT Media Lab as an introduction to computer programming.
His zeal and talent for explaining is remarkable. I’ve been enjoying the “60 Second Scratch” screencasts (explanatory videos) he has been uploading to YouTube in the past two weeks. For example, check out this little gem: