Scooby Do Mystery Party...I made invitations on the computer which said "Calling all meddling kids...Your help is needed to solve The Mystery Of The Missing Pinata Stick"  The date, time and location of the party were printed backward with directions to hold the invitation up to a mirror to reveal the "top secret location".  I added our phone number as the tip hotline where the kids could call and RSVP.  I downloaded some Scooby Do images from the internet and decorated the invitation with them.  I purchased a Scooby Do pinata and a decorated pinata stick. We live in south Texas and a pinata is a vital part of every birthday party.  I made various clues on the computer that the kids had to solve in order to find the next clue and so on. One clue was a jigsaw puzzle that they had to put together to solve; another was a rhebus puzzle and one was a code along with the decoder.    I made lunch sacks into briefcases by painting them black and cutting handles into them.  I gave the briefcases to them at the start of the mystery. At each new clue spot, there was something to add to their briefcase. One spot had a small notebook and a pen. Another had chocolate gold coins and another had a Scooby Do dog collar with candy in the dog tag (I found these at a local discount store). The pinata stick was at the last clue spot and the kids took turns whacking Scooby to get more treats for their briefcases/treat bags.   We played Pin the Dog Tag on Scooby. I bought a Scooby Do poster at Wal-Mart and made up little dog tags out of card stock on the computer.   The kids loved solving the clues although they solved them faster than I thought they would!