Download "Sound Around Kid" Android application from Google Play. Free for all, unlimited audio data. Download "SoarKid" Android application for child phone.
https://play.google.com/store/apps/details?id=com.soarkid.soundaroundkid
Ensure the safety of the child.
Listen to the sound from the child's phone (from microphone).
Simple to usage, fast pairing, free for use, secure.