Mole lived happily underground and prepared for winter, but then humans started building a house nearby and destroyed Mole's hole! Now Mole need to set off for a dangerous journey through the subway, ventilation and underground tunnels to find a new home. This app will be useful for all ages, but it will be of the highest educational value for preschoolers and first- and second-graders. The author is a child psychologist. The story includes educational games and tasks to train logic, attention,