I posted back in December about how much my younger 3 enjoy the Nancy Drew computer games.
A couple of months ago, I saw the little girls had propped an open book to look like a laptop for their dolls to play with! I asked them if they'd like to make a little laptop for the dolls and they thought it was great idea.
Simple enough using cardboard taped together with black paper on the back and for the "keyboard". They used a white gel pen to create their own keyboard on the paper.
I found a Nancy Drew image online, printed it out, then tacked it to a piece of black paper with a glue stick. I cut it out, pulled off the pattern, and added a piece of yellow construction paper for the light beam, all mounted on a white background. Fairly easy. If you had black ink (which we don't) I suppose you could just fussy cut the black print out and be done. I've been printing (for 2 years now) in magenta and blue and yellow and it's all very faded until I decide what kind of printer/scanner I need to get. I don't want to buy the expensive ink that goes with our printer when it needs to be replaced. Long story. Not worth telling. :)
The dolls may need to have limits put on their computer time, they've been sitting with their laptop open for weeks!