vibraspider
thingiverse
Check out this tiny toy for kids: http://www.youtube.com/watch?v=vDJkGRML7fE&feature=youtu.be. It uses a CR2032 (3V) coin cell and a vibra-motor from a mobile phone or pager, along with inexpensive pipe cleaners for the legs. The body is printed in PLA at 0.1mm height and 20% infill, while the arms are printed at 100% infill.
Download Model from thingiverse
With this file you will be able to print vibraspider with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on vibraspider.