Laughs the more the merrier -- Tongue what a muscle! -- Saliva it's more than just spit -- Tickles giggle, giggle -- Urine have a sip of pee -- Skin what's in that dust? -- Bones tiny bones, big job -- Sneeze get out of the way!.
Summary
"Discover why we laugh and sneeze, what dust really is, and why we can't tickle ourselves"--Provided by publisher.
