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Erika Kirk honored late husband Charlie Kirk Friday by posting a heartwarming video of him teaching their daughter some of the basics of physics.

In the video, which had already garnered more than 1.3 million likes by Friday afternoon, the conservative activist sits at a table with their young daughter, playfully explaining Isaac Newton’s three laws of motion using her sippy cup and a pair of sunglasses.

"My favorite memories will forever be us raising our babies together. I love you [Charlie Kirk]," Erica Kirk captioned the video on Instagram. "Tell Sir Isaac Newton that GG is ready for her quiz."

TURNING POINT USA ELECTS ERIKA KIRK AS NEW CEO, CHAIR OF THE BOARD FOLLOWING CHARLIE KIRK'S ASSASSINATION

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