There's a great song by the Canadian kids' entertainer, Fred Penner - think it's just called Goblins. Haven't listened to it since my big six-foot bruiser was a little two-foot toddler, but it has a sing-along chorus in which the various horrifying features of the goblins are listed - the tension mounts to the last lines:

With their goblin brains,
They can spell their names:
G-O-B, L-I-N,
G-g-g-goblins!