Zoombinis Mountain Rescue is the second game in the franchise and boasts improved visuals and sound over its predecessor, Logical Journey Of The Zoombinis. After re-releasing the original game, The Learning Company developed two sequels, one of which was this.
After the foundation of Zoombiniville, the Zoombinis find peace once more, until a small group of them get trapped inside a cave seeking shelter from a storm. They meet up with strange creatures called Boolies who occupy a city known as Booliewood. As a result of the storm, the Boolies have been scattered across the land, and their leader, the Grand Boolie Boolie, has disappeared. The goal of the game is to recruit a total of 400 Boolies to Booliewood to resurrect the Grand Boolie Boolie.
After they've all made their way home, the Mighty Boolie Boolie returns and the game ends.
Other puzzles in the game include multi-dimensional movement, rotation puzzles, and several deduction problems, as well as new versions of puzzles from its prequel, Zoombinis: Logical Journey.
The graphics have been upgraded in this game and the Zoombinis now use 3D graphics. There are now three difficulty levels for each puzzle instead of four.
The term Boolie is a pun of Boolean, the type of logic used for the characters here. The Boolies are either happy or sad: they must be one or the other.
Source: Wikipedia, "Zoombinis: Mountain Rescue", available under the CC-BY-SA License.