conversation after church this week

A: there's a church activity at 7.30 and i want to be in it and you need to call naylani's mom and tell her i'm going to be in it.
(ps, friday... talent show)
Me: what do you want to do?
A: um...
Me: it's a talent show, what talent to you want to show people.
A: um... i can play the piano
Me: but do you know how to play the piano?
A: (matter-of-factly) yes mom, you just hit the keys! see (unmelodic demo)
Me: we'll see... ... ...