How can i wrap up pennies so they won’t make a noise when you shake them?

I want to give my girlfriend’s dad about forty dollars worth of pennies, because he collects them. But I don’t want him to know that it’s pennies so he’ll be really surprised on Christmas. How can I wrap them up so you won’t hear them when he shakes it or moves it?

I don’t want to wrap them up in those coin rollers, It’ll be funnier this way. ;)