We have been teaching Irfan to say 'thank you' whenever someone give him something or do something nice for him, but every time I tell him to say thank you I would get a 'welcome' reply instead.
Mama : Irfan, I'm giving you this bottle of milk ok, so what should you say to me?
Irfan : *blur face*
Mama : Sayyyyyyyy....thank you.
Irfan : Welcome.
Mama : No!No! Read my lips, THAAAAANK YEWWWW!
Irfan : *tilting his head to the side konon2 macam cute* Welcomeee!!!
Ok. I rest my case.