What's new at the Ozaukee County Fair: Sand belt races and a 32-foot treehouse

CEDARBURG, Wis. (CBS 58) -- You'll find all of your old favorites at the Ozaukee County Fairgrounds. Check out everything 4-H has happening and enjoy vendors from all over. It's the 165th year, and for the board, it's important to keep the fair tradition going. 

Wednesday, July 31 is day one of the fair. 

This year, you'll also find some new stuff that is happening, including electric belt sander races. Anyone can sign up ahead of time to race their sander down a track. The top three winners will walk away with prizes including tools from Milwaukee Tool. 

This year, a 32' redwood treehouse is also visiting. This is the first time the owner of the treehouse is opening it up to the public. You'll step inside the large hollowed out tree made into living quarters decades ago. It's one of three left, and redwoods are now protected by the government. 

The Ozaukee County Fair is free to get in. It has a full carnival, food and a demolition derby. Wednesday night is the annual fireworks show.