Meridia’s Beacon 3D model, split in half, added hollow hemisphere to each half to hold electronics. When powered on, the electronic system uses an accelerometer to detect when the Beacon is picked up, then the arduino sends a command to the dfplayer to play the mp3 loaded to the micro sd. the dfplayer sends the output signal to the amplifier, which finally feeds the speaker. Now to just figure out how best to secure the two halves! Parts list: -Arduino nano -mpu 6050 accelerometer module -df player mini + 1gb micro sd card -4 ohm speaker -pam 8403 amplifier module -simple rocker on/off switch -9v battery -680uf electrolytic capacitor -120pf ceramic capacitor -1000ohm resistor -wire -blank pcbs