In case you're at a loss as to what to get that special gorilla in your life for their birthday, maybe you should consider kittens.
That's what the staff at the Gorilla Foundation decided to give Koko the gorilla for her 44th birthday, as seen in an adorable video that is going viral online.
Using these sign skills, Koko told her handler she wanted one of the new kittens placed on her head.
These aren't Koko's first kittens. She got her first feline friend in 1985, a kitten with no tail that Koko named All Ball. However, All Ball was hit by a car 6 months later, so her time with Koko was short. Since then, Koko has adopted several other kittens, including two named Lips Lipstick and Smokey, over the years.