I also went to the Eurocade 2014 today with my 7 year old son

As he is somewhat of a Mario addict, he mostly wanted to play Mario games on the various consoles that were hooked up to projectors. He did try most of the arcade games, but in general he was to short to be able to clearly see the screen. I had the opposite problem, as I felt most games were made for midgets

I really enjoyed trying out all the various arcade games. Some highlights for me where: playing star wars with a yoke for the first time ever, having fun with 3p Bishi Bashi, 4p dariusburst on a massive 32:9 dual widescreen, playing pac man with a proper stick (instead of the JLW).
I also played Sjaak's Lovers in a Dangerous Spacetime Arcade Cabinet

Here are some random pics.