My son learnt how to play music on Alexa and stop it with "Alexa, stop". Unfortunately he now stops it playing music that my wife and I want to listen to - or t

My son learnt how to play music on Alexa and stop it with "Alexa, stop". Unfortunately he now stops it playing music that my wife and I want to listen to - or tells me "Daddy, stop" if I am talking and he wants to say something...