Yeah. Huh. Here's what the creator has to say about it:
The creator of this mini model has previously built a much larger model of the ATLAS detector (which can be seen on the project page as well), but obviously, it's far too large for a real LEGO set, thus the creation of the mini model.
The idea is to ship a leaflet, with information about the real ATLAS experiment and the physics it is exploring, along with the parts. Thereby we could give each and every customer some insight into this very interesting and fascinating subject and offer possibilities for further education and/or contact to people within ATLAS.
The model is and will be used even more in education and outreach projects to promote particle physics in the public. It serves as a perfect eye catcher, a tool to discuss the basic design of particle detectors such as ATLAS and is the perfect souvenir for people of all age that took part in one of our plenty outreach events.