The Columbus Zoo and Aquarium released a video of a happy polar bear cub, beyond adorable even in slumber.

A young polar bear squeals with content in a video released by the Columbus Zoo and Aquarium.
But the rattle-like trill of this adorable baby bear is just the beginning. 
The cub sticks out her tongue, flails her limbs, and twitches, all while asleep. 
The five-week-old polar bear cub weighs just over four pounds and is only 16 inches long. 
Her eyes began to open on December 10th and her motor skills are said to be on the upswing. 
According to the zoo, “She has started trying to stand up