My kids wanted a rolling pin for their playdoh but I wasn't completely satisfied with the other designs I found, so I designed my own.  This is fully printable (3 pieces), and actually rolls.  No glue, no screws.  

One of the pieces has minimal supports.  To remove them, simply twist them off of the threads.  

To assemble, simply slide the middle rods into the roller and screw together.  Once assembled, give the roller a few turns by hand.

Designed and printed for the A1 Mini.