When a cryptic message turns up in a bottle in the Ayrton Park wading pool, Alex suspects it's from Ancient Egyptians or someone shipwrecked on a desert island .

The Junior Rangers weenie and marshmallow roast fundraiser is in danger of being shut down because of a ban on open flames.

When a geocached item seems to have disappeared along with the soil it was buried in, Addison is intent on finding out what happened to it.

When the drains at Pizzamat and Hang 20 start backing up, Alex knows exactly what’s caused it – a sewer-gator or maybe a blob monster from outer space.

When Addison’s mom, Detective Patel, comes to the school to talk about her work as a detective, she intrigues Addison and the other kids.

Addison has to solve the mystery of what’s making scary sounds after Donnie convinces the other kids on an Ayrton Rangers camping trip that a mythical spook 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 in the community garden - then have a mystery to solve when it unexpectedly disappears.

When Addison and her classmates get a school assignment to write about local news - and the news is that laundry is going missing from balconies around Ayrton Park.

Addison’s excitement at bringing Eureka and Gyro in for a 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 shoe-in to win the annual race - until something or someone makes it mysteriously slow down to a crawl.