Becoming 21 is a big deal -- besides being legal, you're officially an 'adult'! There's a lot of party supplies that are themed around the 21st birthday. My
favorites are the ones that you can freeze like ice shot glasses, jewel ice cubes, and cool ice stirrers and kabobs. They also make great 21st birthday gifts too. Just give them in advance so you can have fun at the real party! Check out Perpetual Kid to get more 21st birthday gift ideas.