My girls are 6 and 3 years old and keep squabbling all the time. They squabble over everything, from toys to television. Often they both just deliberately wide each other up. I have tried mediation, talking to them, and time out, but it doesn't seem to be improving. It is at the point where it is upsetting me a little - There is only a 2 and a half year gap, so I thought they would be friends and play together. Has anyone been through it? any tips appreciated! 