"When shall we three meet again?" Eldritch screech. Lightning flash. Cauldron bubbling and all that.
"Coo! Gurgle!" It's less a cackle than a baby's belly laugh, followed by solicitous suckling on a bottle of milk.
But you can't say that it ruins the effect any, once you see what the little darling is wearing!
This Halloween night, let your infant be the best dressed little witch abroad. Comes complete with automatic spells to make your neighbors go, "Awww! Bless!"