Jesus, shes 10?!?!?!?!? Are girls maturing faster now or is it just my imagination? I think I was 15 my first time! Wow...
Okay, shock over.
Start her off with pads. Yes, tampons make it easier when running around and all of that. But she's young, and with this being the strat, tampons might freak her out. Have your wife talk to her, explain the process of tampons (inserting etc.)
Im amazed that you're posting on here, being a man. I think it's great that you're concerned for your daughter, and seeking information