Upgrade ! My son can't do crescendos on his digital piano

[ladynade]

It doesn't have the weight when you depress the keys and perhaps I need one where there are pedals now. His piano teacher said to buy a yamaha digital piano - but which one???? Please help!

Regards,

Novice..

[markymark]

Is her playing a portable keyboard or something?

What model is he using for practice?