Simple put the solar panel near some lights, and pac man's mouth will rapidly open and close.
Step 1: Parts and tools
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.