Best way to deal with disruptive players at training

Hi All

I am a fairly new coach for an under 12's girls team and I have a couple of the girls who don't pay attention and disrupt the training session by doing their own thing and this is not fair and 90% of the team that just want to learn and play football.

All the options I can think of I don't sit well with me! I was thinking of taking away match time or speaking to parents, but have talked myself out of both.

Any ideas?

Thanks 

Damon