We have tons of costumes for daily use here, so I told them they can choose what they wanted from that supply. ODS(5)-firefighter, MDS(4)- Captain America, YDS (2.5)- Woody or Buzz..depends on which day you ask him :)
Our 16 month old has 4 costumes, because I love Halloween and we have 4 different functions to go to. So he will be Harry potter, tigger, an ewok and a bee.
But that might change depending on how many other costumes I see.
ds(5) is going as iron man, dd(4) is going as light up cinderella, dd(3) is going as a fairy princess, im going as fiona the human from adventure time, df is going as psy from gangnum style, and my brother who lives with us is going as the tall guy dressed all in yellow from the gangum style video