There wasnt much to your footage of the kids playing , but for the footage of the kids playing in the park you have to look further.

when seeing the kids playing I found that to be a good way for character development....also the lenght of time that you filmed them in the park could be a good way to display time at lenght...(on your cuts you could have put 1 hour later.... 2 hours later... 3 hours later..when in reality it was only maybe one hour of footage... and that is just an example if you were using time as a factor, though I think you were just getting some family footage..but looking at your video gave me some prospective on filming.