Making kids say sorry?

[apples and bananas]

I ask them to say sorry. I can't "make" them say it.

But, I find that when I start them really young by telling them to say they're sorry and why, they can't say it yet, but as soon as thye can, they start.

I have one stubborn little one that will not say she's sorry if she thinks she was right. I put her in time out, but that's only if I know she's being stubborn about it. She has that look on her face. When she's done in time out she goes back and apologizes. She's 2.5