Boy Costume Ideas:

Boy:
COSTUME 1: Dark Clothing
Plain/artist-band dark top. Dark jeans. Converse/boots.

COSTUME 2: Colourful Clothing
Indie influenced clothing. Checkered shirt, plain light coloured top, blue/dark jeans, converse/boots.

COSTUME 3: PJ/Bed Clothing
No top or plain top, pj bottoms.