For those who love 3D printing, a netizen by his name "les champignons" has designed and made very cool blueprints of keychains with the logo of Boinc and Gridcoin on it.
You can download the free blueprints from here and here, you can also support the author of this work if you can or want to, through the same website. your help will be very appreciated.
Original Post: Gridcoin