(4 letters): A "punny" clue referring to "Early hobbyist's computer," specifically the Coleco Adam
The most common answer for the crossword clue is KIT .
(5 letters): A common purchase for hobbyists who build miniatures or replicas.
(3 letters): The most frequent answer, referring to a set of parts or tools for a hobby. GLUE (4 letters): Often used for modeling or craft hobbies. GEAR (4 letters): General equipment for various activities.