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The National Park Service is celebrating97 yearsand your family is invited to a birthday party this weekend.

Saturday and Sunday families can Camp In' Under the Arch for free.

"It's a play on words because we're not actually camping, but we're doing a camp in and we're under the arch," said Julie Northrip, Gateway Arch Dir. of Education.

Kids can learn about camping, fishing, hiking and more.

"We just want to encourage people kids, families to get outdoors and do some outdoor activities," explained Northrip.

Camp In' Under the Arch is going on Saturday and Sunday from 1pm-4pm. The event is free and no reservations are required.