Got tired feet? You'll love this!
After trying to roll around a foot massager on the floor, I felt compelled to design my own that doesn't walk around on the carpet.
Enjoy!

This is an 8 roll device. It can be expanded on but you'll need to create a bigger housing.
The rollers were printed in halves and glued together with the help of a 1/4" bolt.
Once the glue is setup the rollers can then be stacked together on an all-thread rod that runs through the housing.
2 flat washers were used on the two inside extreme ends for a tight fit.

..and yes it works well!!
enjoy!