• 3D wooden puzzle kit recreating Sherlock Holmes' office at 221B Baker Street. • Includes 141 precision-cut pieces for a perfect fit. • Equipped with a smart light sensor that activates the LEDs automatically upon detecting movement. • Assembly level recommended for adults and young people aged 14 and up. • Estimated construction time between 3 and 5 hours. • Made of eco-friendly MDF material and includes glue for assembly. • Ideal as a decorative element for shelves and bookcases. • Requires 3 AA batteries for the lighting system to operate (not included).