I was so excited to take my daughter to see Big Time Rush. They played in KC at Worlds of Fun, outdoor amphitheater. The tickets said "4:00" as the concert time. We lined up at 3:30 because it was general admission. They took our tickets as we walked in, thus taking away our ability to leave and come back. There were 4 opening acts...however NO ONE starting playing until almost 6:00. A DJ was playing music in the mean time, however it was 100 degrees and there were lots of excited kids looking forward to seeing Big Time Rush. Between opening acts, more DJ music. Long story short, it was almost 10:00 pm before Big Time Rush started their performance. By that time, most children, including my daughter, had lost their patience, enthusiasm, and were worn out from the heat. Of course there was food, drinks and water all being sold at outrageous prices, and what choice did parents have...let their children starve and dehydrate when it was 100 degrees out? When BTR did take the stage, even though we had repeatedly been asked by event staff not to stand on the benches, of course the older kids/young adults all jumped up onto the benches, making it impossible to see what was going on. After waiting 6 hours to see them, my daughter couldn't see the concert and we elected to go back to the amusement park to get in a couple of rides before the park closed since we had unexpectedly been trapped for 6 hours in the amphitheater. Of course we could have left at any time but would not have been able to get back in. A simple sign could have prevented this disappointment by letting parents know what time BTR was actually going to play. NO ONE expected it to be 10:00 when the tickets said 4:00. Not to mention the first 2 wasted hours where NOTHING HAPPENED. Don't get me wrong, we still love BTR...but everything about this concert was handled very poorly. We are not the only ones at the concert that could not believe how long we were made to wait.