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Edith knew that technically she was not allowed to be in the Weapons Development Laboratory without one of the minions to keep an eye on her, but it wasn’t any good developing a Super Secret Super Slime Shooting Slingshot for sliming people if people knew you were doing it. And besides, before she built the Slingshot, she needed to create the slime, and that wasn’t going to explode. Probably.
She was concentrating so hard that she didn’t even hear Dr. Nefario’s scooter come up behind her. But it turned out okay. He knew all kinds of ways to make slime.