Stone cats are really fun. Definitely oddball; very different in looks and behavior from anything else I've ever kept. Just make sure they have really clean water. Not sure how they'll do with bumblebees, never having kept them. They are fairly inactive, relying most on camouflage for survival in the wild, but once in a while they'll get the urge to go exploring, and they sort of bumble around the tank. It can be a bit difficult to get them enough to eat, because they feed when they feel like it and not a moment before. I strongly suspect they are blind or nearly so. Really cool little guys.