What exactly happened at the observatory? The famous singer Willi Stardust has disappeared, along with the valuable sun from an old model. Now the three ??? Justus, Peter, and Bob are called to action. They must reconstruct the events and receive help: Children aged 8 and up can read the exciting short story and piece together a hidden picture puzzle, one piece at a time. The 200-piece puzzle contains clues and riddles that will assist the detectives in solving the case. It comes with a star map for crafting. The puzzle glows in the dark – a cool decoration for a child's room. Suitable for 1 player or as a team activity.