"They were experts at climbing Mt. Rico already. Mama often rolled chin up with them crawling all over."

As soon as the kittens found their feet, they were ready to venture out of the bed. It was only a matter of days before they started tackling their room and discovered the art of zoomies.

"Playing at this age is adorable, rolling around, waving legs in the air while taking gummy chomps at the nearest siblings' ears, nose, face, whatever they can try to fit in their mouth," the rescue wrote.

"It's a wriggling pile of kittens, until slowly they start falling asleep, and it ends up as an adorable snuggle puddle."

Just like that, the kittens are five weeks old to date and blossoming into playful, mischievous young cats.

"Their personalities are showing more and more, and we have some very snuggly babies emerging, between their bouts of crazy play, sprinting across the room, and darting up the cat tree."