Download the app, print the marker and view the 3d models you want (Available on iOs only, on Android you can play with the Cubes, the 3d model import will be available soon), you can even create your own !
Get the app on the Android Market or on iTunes, it's free !
Augment on iOs : http://itunes.apple.com/us/app/augment/id506463171?l=en&ls=1&mt=8
Augment on Android : http://market.android.com/details?id=com.ar.augment
Website : http://augmentedev.com
Markers : http://markers.augmentedev.com