no ley, i have been saying NO to my DS since he was 4mths old, he understands but perhaps not the word NO but by my stern expressions. As he grows older, he relates stern expressions n NO together.my boi did tt at ard 4-5mths....tt's when i noe he is ready for solids then now he is 6mths, stop doing tt le...
btw, i dun tink they dun understand 'no' yet....so no pt get angry lo...jus keep wiping it up first....my boi onli seemed to understand 'no' recently....