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Surprise your friends with this sound system that you can hide or wear!

Watch the video: http://pbskids.org/designsquad/build/hack-greeting-card/

Step 1: Here's what you need to hack a greeting card!

Musical greeting card. Before buying a card, ask around to see if someone has one to give you.
Scissors
Tape
String
Hiding place

Watch the video: http://pbskids.org/designsquad/build/hack-greeting-card/

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