Here's one of the illustrations I did for a set of 5 over 18's conbadges for Amecon 2004 which was held in August. The theme of the badge is nature.

Note: The background is plain on purpose because the colour is supposed to act as an 'identifier'. Blue backgrounds mean the badges are for people over 18, green backrounds are for people under 18, and purple badges indicated Non Residential members whether they are over or under 18.

Original Amecon mascot concept © Jake Fudge
Amecon rendition © Me