Monster MashMonster Mash

"Halloween is the best time of year for the Invisible Boy! And this year, he's excited to pretend to be a ghost and spy on some older kids, and scare them as well. But when those kids figure out their secret, Stanley and Gene make a dangerous bargain: compete with the teens to build the scariest haunted house, or their invisibility power will be exposed. With Stan's imagination and Gene's inventing skills, it should be an easy win. But after all of their animatronic monsters come to life and have Stan's sister is in their sights, it'll take a lot of new gadgets and wily ideas to save the day."--Provided by publisher.