Assemble the circuit on your solderless breadboard as shown in the circuit diagram. Shake your switch to test that it triggers your random sounds!
We found that sometimes on power-up the activation light would stick on, requiring a reset to the board. So you may optionally add a switch or button between Rst and Gnd to reset the board manually, or just take a jumper wire and plug/unplug after powering on.
Peel and stick the solderless breadboard to the inside of the box, and tape the battery pack and sensor down.
Optionally, transfer your circuit to a Perma-Proto board for a more permanent arrangement.
Try out both sensors before deciding which one is right for you, and make this sound prank your new family tradition!