5th Grade Leprechaun Trap-Engineering Challenge!

How do you trap a wily, gold-loving, magical being using only common household items?  Fifth grade put their head's together to create a Leprechaun trap that would trap a 12 inch leprechaun without hurting him/her and included camouflage, using only common household items all with-in a time limit.  We used a rubric and graded each other's presentations while creating a book for each team with "thumbs up" comments and practical suggestions.