The kittens make faces at the camera
The kittens know a sign language. Well, they know a sign. If something is either cold or wet, they shake a paw as if they've touched something wet. They learned it very early.
They are very dog-like. They fetch, drink from the toilet bowl, and have separation anxiety when we leave.
The kittens are expert mathematicians -- calculating trajectories and midpoints to intercept and adjust our paths.