If you're not in the mood for board games this Christmas, why not gather around a computer screen instead and take up CERN's challenge to find the Lego minifigures that were hidden around the facility during its Google Streetview shoot?

CERN launched the scavenger hunt earlier this week and has promised that there will be two winners—one from Cern and one from the general public.

In total, around 20 minifigures have been hidden in the racks and servers, but to have a chance of winning, you only have to locate three of them.

"These characters were placed about the Center for the arrival of Google's Street View team for the world to discover," says CERN. It says that if you take up the challenge, you should keep your eyes peeled for a range of characters, including Hawaiian dancers, gorillas, and aliens. Gizmodo has obviously been doing its homework, as it reports that a pharaoh and a leprechaun can be added to that list.

Once you've found your three minifigures, be sure to take screenshots of them, and then e-mail them to TreasureHunt-ComputingCentre@cern.chx. You have until January 31 to enter. The winner will be contacted by e-mail, and they will be able to choose any item they like from the CERN Gift Guide.

Don't fret if you're struggling—CERN has provided maps of the two floors of its computer center to help you out, and it also says, "Try looking on top of racks and servers; these figurines won't be hanging from the air!"

This story originally appeared on Wired UK.