Riley has a basic understanding of plumbing, though nowhere near as advanced as his brother, Malley. However, he resents like hell that DiNozzo came into their world and interrupted their dynamic duo. Riley and Malley tolerate DiNozzo, but even on three epilepsy medications, DiNozzo is too spastic for the brothers.
Note to all would-be kitten owners: If you get a kitten, get two. Trust me. Especially if you already have cats.