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When Rider takes the P.I. Pack to a ski resort on vacation, they get caught up in a Snowbot mystery, instead.

The Earth Day Fair is days away, but Nate's classroom project--a robot named Mr.

Follows fifth grader Max as he searches for his best friend who disappeared, leaving behind a strange note.

"On an island nation in the Indian Ocean, the explorers venture through a vast underwater world and take part in a friendly robotics competition.

When both a classmate's DIY robot and the class hamster go missing, Detective Wednesday Nadir and her service dog, Woof, must use the scientific method to solve two cases at once.