A hushed two-line riddle about something higher than a house and higher than a tree. Short enough to say once and then let a small child guess the answer, which makes it a nice quiet moment before bed.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
Higher than a house, higher than a tree.
Oh! whatever can that be?
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition