Here's a few pictures I would loved to have had on my wall when I was a young teenager. The picture on the top is from Tesla's lab and shows arcs of high voltage electricity jumping the gap between two Tesla coils. Every self-respecting kid wants a set-up like this in his garage. I tried to find a good black and white photo of Edison's lab, which I also would like to have had, but found nothing that grabbed me.
Here's (above) a picture of two gladiators. It's a grizzly scenario and it appears to have been painted in urine but boys like this kind of spectacle. Click on it to see more detail.
The busy black and white photo is a replica of Sherlock Holmes' flat on Baker Street. The man on the horse is obviously Napoleon. Every kid identifies with Napoleon but few adults do. Kids also identify with pirates. Thanks to The Pirates of the Carribean there's no lack of interesting posters on this subject.
Here also is Attila and his barbarians. As a kid this would have inspired lots of imaginary swordfights as I fought to defend Rome and my bedroom from the screaming hordes.
