Oklahoma City turns 125 today, and everyone's invited to the party. The City of Oklahoma City is having an open house today at City Hall, with free birthday cake, tours of City Hall, history lessons, a Spokies bike tour and children's activities during the Festival of the Arts. And that's just where the celebration begins.

Here's a full list of events happening around town. Happy birthday, OKC!

Dr. Bob Blackburn from the Oklahoma Historical Society giving a history lesson at City Hall

Come sign Oklahoma City's birthday card

The City's first motorized fire rig, a fully restored 1910 engine, is on display on City Hall's east plaza