"I miei figli adesso possono nuotare."

Translation: My children can now swim.

[jyack1]

can this also be my sons?

[marziotta]

"Figli" = "sons"... it would even be a better translation, at least for the content.

Anyway, I find the sentence strange...

"I miei figli adesso possono nuotare" would rather mean "My children now are allowed to swim"

To say that they are able to swim I would say "I miei figli adesso sanno nuotare"