Is there a wearable baby monitor your friend could sleep with? Try opening it up and melting candle wax onto the speaker. You want it to vibrate instead of maki

Is there a wearable baby monitor your friend could sleep with? Try opening it up and melting candle wax onto the speaker. You want it to vibrate instead of making sound. If the candle wax doesn't work, there's probably a similar hack that will.