Oh my god, this reminds me of SO much.
I would never do that, but my parents are real sneaky. I remember a few incidences where they lied about MY age.
1) It was some time in 2004 when "Harry Potter and The Prisoner of Azkaban" came out, my rentz totally lied about my age, along with my sisters. I don't remember what she said, exactly, but I remember this, cause I knew my mom didn't "pay the right amount" xD
2)It was some time in 2006, and my parents and my sister and I went to Canada for vacation. We went to Niagra Falls, and we were purchasing tickets for "The Maid of the Mist" ferry ride. I was like 9, I think, but my parents told the ticket guy I was like, 6! So se saved half the price... it was something like that, don't remember exactly. :P
3)The most recent time was actually this New Years. It was my dad's birthday, and the family was gonna go see "Avatar". Dad went to get the tickets. Mom called her and said to get 2 tickets that were little kids tickets. I'm like "Mom, mom, I'm 14, its not gonna work" xD, so she didn't buy them. :P
Those are just a few, there are more, but those three were my favorites. :P