Addison must solve the mystery of the scary sounds after Donnie convinces the other kids on a camping trip that the Headless Haunter is wandering through the park. | When swarms of mosquitoes mysteriously descend on the park, the kids’ summer movie night is in danger of being cancelled unless Addison and her friends can figure out a way to stop them.
Addison and Alex dig up what they think is an Ancient Roman coin – then have a mystery to solve when it disappears. | When Addison and her classmates get an assignment to write about local news, Addison turns investigative reporter to crack the case of laundry that is going missing from balconies...
Addison’s excitement for show and tell at school turns to consternation when Donnie turns up with a robot that can do everything hers can do – only better! | Addison and Alex’s record-setting soap box derby car seems like a shoo-in to win the annual race – until something or someone makes it myst...
When Kevin’s new radio-controlled model car starts acting like it has a bad-tempered mind of its own, he believes it's haunted and asks Addison for help. | When helium balloons for Tess’s fashion show start inexplicably popping, she asks Addison to help stop the rest of the balloons from popping ...
