The city of Bowling Green is offering limited edition challenge coins.

Originally, 300 coins were available for purchase, but that has increased to meet demand sales benefit, downtown events and festivals.

It's all part of a broader celebration of America 250, along with downtown banners and giveaways and a special Liberty Tree planted at Pioneer Cemetery.

Bowling Green Mayor Todd Alcott, a U.S.

Air Force veteran, is a coin collector, and he says he was inspired by events from his childhood.

50 years ago, when I was four, I remember the 200th birthday, and that year was really a lot of cool things, and there was a Liberty train going across America, but then there was a coin and it was the quarter.

And I remember it really stuck out because it had two dates.

It had 1776, 1976, and that celebrated the 200th.

And it was cool because I started collecting those coins and I found out it was on the dollar fountain is on the 50 cent piece, and it was just something really special to kind of commemorate that.

And here we are 50 years later, and we get to show a generation that really hasn't seen the big birthday of America.

And this is a big birthday 250 years on the shield that the Eagles holding is the representation of our Bowling Green water tower.

And if we look up anywhere you are in Warren County, you can see the Bowling Green tower.

It has the stars and stripes, but the stars and stripes on the shield is our tower.

Warren County was founded by veterans of the Revolutionary War and is named after a Continental Army general, Joseph Warren, who sent off Paul Revere on his famous midnight ride