A genius at the University of Alaska Anchorage says he’s built the world's largest human hamster wheel.

25-year-old Andy Liebner and his friend Natalie Semmens have built a 15-foot tall hamster wheel out of scrap lumber and some old swing set supporters.

The pair spent 15 hours over the span of four days putting it all together.

Liebner contacted the Guinness Book of World Records, which then sent paperwork to get it verified and make it official.

After the wheel goes in the record books the two plan to give it to a daycare next door. The daycare will place the wheel on its side and use it for a toddler play area.

Check out the video below!