Poke hole in lower part of foam board with screwdriver.
Feed both light wires through back of foam board.
Use small piece of wire to secure light wires to foam board. Continue the same step to create a circle for the face.
One light wire will be used for the frown, the other for the smile.
Cover light sensor with long led and electrical tape. This is used to turn off the frown and turn on the smile when sound trigger detects sound.
Tap away to have FUN! :-)