SIL just got engaged and would like my DD to be her flower girl.
DD, 4 and half, is quite the tomboy, hates wearing dresses, loves boys things, etc. (Sometimes worries me, hope it's just a phase. Also have twin boys, 18 months, so hope it's a reaction to having brothers)
DD hates wearing dresses and said to SIL (not in front of me) that she's like to wear a Spiderman costume instead of a dress. She wants to do Spiderman moves and cartwheels (DD does gymnastics classes) up the aisle instead and walking 
SIL, really easy going about it all, is planning an alternative wedding anyway, no white dress, etc and really doesn't mind, and said 'as long as her niece is happy on the day'!!
But I think the whole thing is mad!!!! I could talk her into wearing a dress no problem.
Imagine the faces of the guests when spiderman crawls up the aisle?!
And the official photographs?!!
DD said in that case, he wants to dress up as Robin from Batman and Robin 