UFO Sighting in Aston, Pennsylvania on July 4th 2015 – cube shaped rotating

My daughter and I were watching the fire works.i noticed something above the fireworks and pointed it out. Then I started recording it while we argued about what it was. Then it flew away. It wasn't until later that I went and reviewed it slowed down and blown up and b u can clearly see a silver cube rotating in the sky. My kid also has a video of it.