Google Disc Circles? What Are These?

I am honestly not sure what these are. It looks like a record but with discs on top of them. Maybe it is a sticker set? halo_lin posted this on Flickr. There are Google icons, Google+, YouTube, Chrome, Android, Maps and Ads. Again, anyone know what this is?

This post is part of our daily Search Photo of the Day column, where we find fun and interesting photos related to the search industry and share them with our readers.