Detective story for children 3-6 years old. Ian is still in kindergarten, so he can't go anywhere he wants. But he has a robot that can go anywhere instead of the owner. This time - in the thick of the forest. And there's a commotion: the lizard's tail has disappeared! What happened? The hedgehog detective takes on the case, and the robot dog becomes his assistant. Let's investigate this case together with the heroes! According to the detective's notebook, we will determine which of the animals left traces.