Julka really enjoyed going for walks in the Old Forest. She always took her teddy bear, whom she named Fluffy, with her. One sunny day, as Julka and Fluffy were walking between the tall trees, they suddenly noticed something strange. There were strange, shiny pebbles lying on the path, arranged in a row one behind the other, as if someone had left them there on purpose. "Come on, Fluffy! Look!" - cried Julka and bent down to take a closer look at the pebbles. Each pebble was a different colour. The first was red, the second was green, the third was blue.... and the last one sparkled like a little silver star. The pebbles led between the trees, deep into the forest, where Julka had never been before. Julka was very curious. Who could have left such colourful footprints? Where did they lead? She and Fluffy moved slowly behind the pebbles, skipping over the roots of the trees. They listened to the rustling of leaves and the singing of birds, but the forest was quiet. The further they walked, the more mysterious the colourful footprints became. Finally they came to a big old tree with a huge hollow. In front of it lay the last silver pebble. Strange, because there was a sort of buzzing sound coming quietly from inside the hollow.... Julka held her breath and looked at Fluffy. Should she look inside?