My 5 year boy's birthday party was planned with a movie theme and Scooby Doo mystery. Prior to the birthday boys arrival, I had the kids draw and write happy birthday wishes on the "Birthday Wishes from your Pals" wall. Purchased Post-it wall paper roll. Was great, just ran it across an entire wall and left crayons and markers on the floor for the kids. Ready to "roll it", kids were given play money and told to use it to purchase their movie ticket (MS Word Template) and Scooby Snacks from the concession stand (hot dogs, popcorn (to save time, brought a couple of bags of Subway's popcorn and found these new animal snack cups made just right for my son's little hands to reach in the bag and scoop up a serving), Scooby roll ups and fruit chews, and juice box). My oldest son, 6 years old ran the Scooby Snack - big boy's responsibility. So kids headed downstairs purchased tickets and lined up to purchase snacks. They really got a kick out of being in controll of what they purchased. With snacks in hand they took a seat and the movie began. They were surprisingly quit attentative, majority 4 and 5 (must say, mostly girls). Figuring would not have their attention for no longer than a half-hour. My girlfriend already rehearsed and a natural by the way called from within the house from her cell to ask for the birthday boy. My son was told "Scooby's on the phone". Gathered all the kids and put Scooby on the speaker phone. Parents not expecting this were all ears also. Scooby conversated with birthday boy on a personal note and wished him a happy birthday. Invited all to join in signing to him. Then Scooby told the kids he had delivered a special present for the birthday boy and that they had to help him find it. Kids were told that at the end of each game event they would receive a "Scooby Mystery Card" (captured image from a Warner Brothers site and printed on front, the back had a treasure chest on most and a clue on four). Three events would be played with a parent conducted each. At the end, the child would take and look at their card. If treasure chest, they went to the "Treasure Box" (box was covered with birthday party theme wrapping paper and divided in two sections - boys items and girls items) with eyes closed and box positioned appropriately. If clue (in this case, the gift was in my truck - picture clues were a key, steering wheel, and driveway), the clue was stuck to the "Mystery Wall". By the way, all themed walls were labeled by signs I made using poster board and glitter. They letters were cut out in a comic way vs. just sticking the square board up. Only children up to 5 years old were allowed to take a crack at guessing. Which the majority did guess "car". An unusual nice day in march, the kids went outside.