Alien Costume Diy . While there is no diy to get you off of the planet, at least one that we have access to, you can at least take a break by creating your own alien crafts and projects! For my 18th birthday i had a costume party and it was cartoon character themed. DIY Alien Halloween Costume Ideas Uniq LOG from uniqlog.com The antenna should be glued on the inside of the back of the headband. Diy family of aliens costumes. I was making a new flying saucer costume because my son changed his mind at the last moment about what costume he wanted.