Here is how to give your tree some motion with an robotic pac man.
Simple put the solar panel near some lights, and pac man's mouth will rapidly open and close.
Step 1: parts and tools
the tools include
1 soldering iron 2 scissors
3 wire stripers 4 hobby knife
5 super glue 6 pliers
7 pen 4 solder
1 sheet aluminum and plastic 2 solar panel
3 low voltage motor 4 capacitor
5 electrical wire 6 steel wire
7 two yellow plastic Christmas bulbs
The Christmas bulbs that you start with must be plastic, glass bulbs cant be cut easily.
The solar panel can be found by dissassembling a solar powered garden lamp, the capacitor can be found by dissassembling a power supply, and the motor could be removed from an RC car. I got these parts from an electronics store, the capacitor was $0.10 the motor was $1.50 and the solar panel was $4.