Combined with a suitable amount of magic boomerang waving, these three magic words invoked the strange occult powers of Lady Elaine Fairchilde, curator of the Museum-go-round in Mr. Rogers' Neighborhood of Make-believe, and witch.

Voiced by Fred Rogers in a rhaspy falsetto, a properly enunciated "Boomerang! Toomerang! Zoomerang!" can sound menacing or benificent, but in either case also sounds rather silly, similar to The Amazing Mumford of Sesame Street's "A'la Peanut Butter Sandwiches!" This makes it a perfectly wonderful nonsense phrase suitable for a children's program featuring arcane magic.