Delaney Krings has a laugh that instantly makes you smile. But underneath those giggles, lies a battle no fouryearold should ever have to go through.

Doctors diagnosed her last month with an extremely rare and aggressive form of terminal brain cancer.

"All you want to do is trade places. All you want to do is take her pain away," said Delaney's mom, Heather WittKrings.

Jack and Heather Krings learned of their daughter's diagnosis in October after taking her to urgent care for what they thought was just an ear infection. But when the medicine didn't work, they knew something was wrong.

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