A new kid comes to Springfield Elementary and Lisa attempts to make friends with this new girl, but for all her trouble she just winds up the victim of this female version of Nelson. Lisa discovers the cause; pheromones given off by nerds are what attract bullies and she presents her findings where there needed most, the "12th Annual Big Science Thing". Meanwhile, after a visit from a baby safety consultant gets the Simpson home safe, Homer decides to go into the safety industry, making Springfield safe for all children.
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