Harry Potter House Slytherin 150 Piece Micro Jigsaw Puzzle In Tube For AdultsMini puzzles offer you more than a little fun! Packed in test tubes, these small 4 x 6 inch puzzles can be completed in a single, 1 2 hour sitting. Challenging but not overwhelming! Makes a great gift idea! Puzzles are a fun activity to do alone or in a group, and make a great gift for all individuals 14 years of age or older at birthdays and holidays.