CHICAGO (CBS) — Operation North Pole takes off Saturday at the Donald E. Stephens Convention Center in Rosemont.

Children and their families will take a holiday train ride from the downtown Des Plaines Metra station to the Crystal Lake stop.

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It’s been transformed into the “North Pole” and volunteers from around the Chicago area help put on the event.

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Those organizing the event say Operation North Pole works with the area’s children’s hospitals to provide a day of “fun and fantasy” for families with children suffering through a life-threatening illness.

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The event includes breakfast, a visit with Santa, entertainment and personal wish list gifts.