Only one, but it sure takes a shitload of light bulbs!
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Five: One to change the bulb and four to pull the ladder out from under him/her.
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He got Avogadro's number!
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Seven. One to change it and the other six to sing about how good the old one was.
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To get to the shell station.
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Hiss-story
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A milkshake
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Bison
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Climb up a tree and act like a nut
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One; she designs the bulb to crawl up the wall, unscrew the old one, and screw itself in.
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