The Three Witches
a skit starring a Lavender Witch (Jerry Nelson),
a Blue Witch (Jim Henson), and a Green Witch (Richard Hunt)
actions in brackets 
[Opening: The interior of a cave with a large cauldron bubbling over a low-burning fire. Eerie music is playing, and we see three witches enter cackling: a lavender one with dark hair, a blue one with white hair, and a green one with blonde hair. The blue witch is male.]
Lavender Witch: It's wish time!
[Forgotten lines about using her magic fire to make the wish come true.
She goes to the fire and says a verse which ends with:]
Lavender Witch: Magic fire, do your stuff!
[We see a big puff of smoke but, when it clears, there's no change.]
Lavender Witch: What happened? My magic fire didn't work!
[Forgotten lines from the blue witch, but evidently he's going to try a wish with his magic kettle of water. He goes over to it.]
Blue Witch: Okay, stand back. Give me some room here.
Higgeldy piggeldy, ding dong dell.
Kettle of water, dig my spell!
[Another puff of smoke, but still nothing.]
Lavender Witch: A lot of smoke, but no magic.
Green Witch: Too bad. But I've got one sure thing that makes all my spells come true.
[She holds up a rubber chicken.]
My magic chicken!
[She gives a wild peal of laughter]
Hobbledy gobbledy, glickery gluck.
Magic chicken, bring me luck!
[Another puff of smoke, but with no result.]
Lavender Witch: Looks like none of our magic spells are working.
[Green witch says something, and she gets into an argument with the lavender witch.]
Blue Witch: Hold it, wait a minute, girls. What if we witches cooperate?
Lavender Witch: Cooperate? Combine my fire with your magic kettle and her magic chicken?
Blue Witch: Exactly. Now, let me just get my kettle of water ...
[He puts it on the fire.]
Green Witch: Throw in my magic chicken!
[She tosses it in the kettle and laughs as a burst of steam erupts from it.]
All Three: One, and a two, and a three, and a ...
Watch the witches cooperate.
And bring us something really great!
[Another puff of smoke. This time the spell seems to have worked.
Lavender witch says something I've forgotten.]
Blue Witch: This is something we all wanted!
Green Witch: Chicken soup!
[Laughs. They all take turns eating it with a wooden spoon. More dialogue?]
Lavender Witch: Too bad we don't know a witch with some noodles.
[Music starts again. Fade out.]
Transcribed by Silvery Shoe
Available on the 3-DVD Set
Sesame Street - Old School, Vol. 1 (1969-1974) (2006)