Amazon.com: ESC WELT Space Box - Birch Wood Puzzle Box for Teens - 3D Puzzles for Adults - Advanced Wooden Brain Teaser Puzzle for Birthday Party and Family Night - Wooden Puzzle
MOC Vending Machine (a level 7 puzzle box)
LEGO MOC Tides (a level 5 puzzle box) by cheat3 puzzles | Rebrickable - Build with LEGO