The Princess and the Pea requires a RhinoStretch, as any Rhino would have smelled the pea the minute she went into the bedroom, mattresses or no mattresses. Unless she had a cold. Peas make a good bedtime snack. Mattresses can be tasty too, depending on what’s inside.
Still, a big tall bed is much fun to think about, and mental gymnastics is a Rhino Specialty. As you Readers know.