My sons (9&7) & I are stuck near the beginning. Gen. Greivous is on a ledge above us jumping up & down. We have built the bridge & crossed over. We have used the force to build a "box". We have shot at the box, we have stood on the box & tried to shoot GG but he's too high up (we have also tried to shoot the white "bomb" that's beside him), and we have tried to jump on other ledges but nothing is working. I know someone out there can help. Please, because we are going insane! Thank you!!!