Our maker group - the Distributed Hacker/Maker Network (Appleton, WI) http://dhmn.net - worked together to design and build CandyBot. For this "make" we had kids ranging from ages 5-13 design and build 90% of the bot.
3/28/2011 Edit: This instructable was made for the National Robotics Week contest and was targeted at the 12 and under age group.
CD jewel cases
Empty tissue box
Plastic cracker/cookie jar
Plastic drink mix canister
A wheel + motor assembly from a broken iRobot Scooba
9 volt battery
Piece of wooden dowel
Paper towel tube
A box cutter/razor knife
Lots and lots of hot glue!
Step 1: Step 1 - Assemble the base
When you have an arrangement that works, begin carefully hot gluing (with the help of an adult) the jewel cases together leaving a channel for the candy chute (paper towel tube). You'll need to hold each gluing until it has cooled enough to hold.
Have a grown up use the razor knife to cut a channel in the base of the tissue box, leaving the back edge connected and creasing it down to allow the candy to slide down.
Attach the tissue box to your newly glued jewel case frame using hot glue.