My 8 year old grandson and I, have really enjoyed solving Mystery Boxes 1 and 2. It has truly been a collaborative effort, and taken us about 3 hours to finish each mystery. He will, likely, keep many of the trinkets, if not the entire boxes, as souvenirs of the fun we've had together. We're excited to receive our 3rd box soon.
Note: Take the clues at face value, rather than thinking every one is in code. You will save a lot of time.