Hi, Barbara - If you had collected a fee for your performance, that would be income and you would have to declare it as such. If you then donated that fee to somebody, you could then deduct it.
In your case, you had no income from the performance, so there's nothing to deduct. If you donated material goods, you would have paid for those goods with money you had received as income - and then you would have been able to take a deduction.
But if there's no income involved, there's no tax, so there's no deduction. You can deduct only the costs incurred. You can't deduct your time, because the government didn't tax you for your time in the first place.
See? Your U.S. Government does have some logic, at times....
-Joe Offer, retired bureaucrat-