Printed in PLA on a Makerbot Rep2. Took about 2hr for each part, printing at 40mm/s.
Came out perfect at 0.2mm layer heights, 0.3mm layer height would cause it to be too tight.
The maze path is really well done, I can tell a lot of thought went in to designing it. If your just jiggling it around with no thought it is easy to miss a turn and get lost in a dead end. The long straight at the start is nice for the people that pick it up for the first time to see kinda how it works.