Ice Cream and Parade Floats - Key to History

Cousins Jake and Aiden can't agree on how to use the magic key that Aunt Lila gave them at the beginning of their visit. Aiden's younger sister Olivia just wants them to stop arguing, and Jake's older sister Ginger is determined to enjoy her last summer before middle school. They all agree to visit the Hull Crossing Independence Day Parade, but it's not as easy to get there as it seems. Continuing the adventures that began in the Virginia's Northern Neck, (Steamboats and Ghost Crabs), the four cousins use the Key to History in the Middle Peninsula.
In the next book in the series, they visit other parts of Virginia and meet some famous historical figures.