"The Tuttle twins are off to visit Grandma's quaint, pink house on the banks of the Monongahela River to celebrate Independence Day. There are parades and rope swings, and all the things that make a vacation grand. But it's not all fun and games. When a greedy corporation schemes to take over Grandma's land and push her house into the river, can the twins stop it and come to her rescue? Can you help them? It's all up to you--the zoning fights, the...