The Long Vacation - The Unfair Science Fair. The Long Vacation The Dumbotz decide to take a vacation but wind up crashing in front of a billboard of a beach which they think is real. Snidely and Cog use this confusion to take advantage of them. / The Unfair Science Fair L-VIZ makes a 98 percent invisible ray gun as her science fair entry. Snidely and Cog steal it, makes themselves invisible and begin robbing the town. Now L-VIZ has to make them visible again to catch them.