I've told all our children if they save money for a car, Daddy and Mommy will pay for the other half. Dave Ramsey calls it 401K Dad.
She asked where the bank was and I told her it was on the computer. Her account is at ING Direct. So she sat on my lap and we logged in. She looked for her name and found it on her savings account. I transferred a dollar from our savings account to her and told her she now had more money in her account. Then I took her real one and put it in my wallet to deposit back into our savings account.
She looked a bit sad, but she'll thank me later!