Mikolaj nicely saying -- cho cho train

hmmm, I would advise, as a teaching mum, never to give up on your child. he most of the time doesnt want to speak, learn... mine says -- Cicho! Silence! when I speak a foreign language too often when he doesnt want to hear it. he is in a process of learning Polish after all. and it's the most important

but a child does learn , all the time, and he does repeat, and does remember words and recognises them even when we could think he has all forgotten
just keep on going, the routine, repetitions and consequence is the road to success :)