This browser cannot speak out loud. Open this app in Chrome.
Only the ones you pick show up on his screen. Start with two or three and add one at a time.
Record on your phone or the tablet. Recordings save on this device. Pick one, tap Record, say it slowly, then stop. A dot under a letter above means it has your voice.
If a letter sounds wrong, spell it the way it should be said, tap Hear it, then Save. Letters with your own recording play your voice and ignore this.