Where's the Heat Thief?: Movement of Heat

Granny Bear hates the winter because she's exceptionally vulnerable to the cold. She heats her house to keep warm. But these days, someone keeps stealing the heat from the house. Momo the cat runs over to help a panicked Granny Bear. Momo knows that heat travels from places to places, so Momo goes around the house to help the Granny Bear find the heat thief.