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Blueprint Heaven is a place where blueprints for certain machines are picked up. Phineas and Ferb uses it to draw up their Big Ideas and Doofenshmirtz uses it to draw up his Inators. It was seen in "I Scream, You Scream" when Ferb came to pick up a blueprint of an ice cream machine, because Phineas didn't have time to make one. Vanessa came to pick up her father's blueprints for a Space-laser-inator.