The inhabitants of Mammoth Island have decided to make gravel for their new roads by dropping boulders off a tower and smashing them to bits. A young Islander suggests that it would take less effort to roll the boulders up an inclined plane than to hoist them up the side of the tower.
The Islanders modernize the old Mammoth Inn and need to install useful tools that rely on sensors, such as smoke detectors, automatic doors, and security alarms.
