Prusa's geeky glasses. http://www.thingiverse.com/thing:5544
The whistle. http://www.thingiverse.com/thing:9206
Be sure to read all the detail, where the guy says 100% infill, otherwise you just get a 'rattler' like mine!
The Hyperboloid Pencil Holder. http://www.thingiverse.com/thing:8433
This one got a big 'thumbs-up' in this house!
Here it is without the pencils in.
Enjoy! Thanks for viewing!