So, Gabe's Halloween costume this year is a skeleton, drawn in white dimensional fabric paint [1] on black clothing. It's coming out great. Wikipedia supplies the artistic inspiration for the authentic skeletal design.

Front http://upload.wikimedia.org/wikipedia/commons/8/85/Human_skeleton_front....
Back http://upload.wikimedia.org/wikipedia/commons/2/2a/Human_skeleton_back.s...

[1] http://duncancrafts.com Tulip paints available at WalMart

See the video of Max and Gabe in their halloween costumes: