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It’s easy to fall down the eBay rabbit hole and start buying up your childhood (hello, 1990s comic book collection!) or throwing cash at things you never knew existed but now desperately feel the need ...

A spaceship crashes on a brightly coloured alien world. A mech robot ejects and lands on the surface with a bang. It emerges from a crater with two huge weapons for arms. So far, so very video games.

Crave freelancer Tim Hornyak is the author of "Loving the Machine: The Art and Science of Japanese Robots." He has been writing about Japanese culture and technology for a decade. E-mail Tim.