We hit upon this idea totally by accident. My daughter brought an old computer keyboard to me yesterday and asked how to spell my name. I told her and then pointed out each letter in turn for her to push. Why did I never think of teaching her letters using an old computer keyboard?!
She went on to ask how to spell her own name and those of other family members. After typing in several names, there were a few letters which she recognized without my prompting.
The keyboard could also be used to teach a child their numbers (assuming it has a number pad), or even the different punctuation marks and symbols. And if your child practices spelling, this would be a fun method for them to key in their spelling words!
If you have an old keyboard lying around, why don’t you pull it out and have some fun with it?