While they are still only fun to her as colored objects and not the mathematical concepts they represent, Nora very much enjoys playing with these foam numbers we bought for a few pennies at the local chinos. The other day I was goofing around with them as she was popping them out of their placemat-sized sheet and handing them to me, and I noticed that they could be interlocked in sequence. It was then that I thought they might make an interesting subject for photography, so I waited until Nora's interest moved to another toy and went to get my camera. I guess you could call this digital photography, eh? Ha!
One through seven.
Another angle.
One through five, stacked.
This is my favorite one. I got the depth of field I wanted very well, but it's a shame I was too careless and lazy to remove the clutter from the background.