Baby Halloween Costumes

I have twins who will be 7 months for Halloween and I want to make some cute costumes. I can not justify spending $ 50 for 2 costumes they will wear once. I am relatively smart, but just need some cute ideas.

zookeeper and zoo animals

Master Chief and arbitrator. Now I know what your thinking "Hes just a stupid kid 12 years" but think about it. Or better yet babies Zombie