Immune System Costume

My 3 year old son became very interested in the immune system after he threw up for the first time over the summer. He wanted to know why it happened and how it happened and how can it NEVER happen again. I showed him a video about germs and that was the end of it! He has been obsessed with white blood cells ever since. He thinks they are the best thing ever! So of course when Halloween rolled around the only logical thing to him was the be a white blood cell. He then gave myself the costume of the red blood cell (because the body needs oxygen) and my husband the germ so he could destroy him! I created the shirt by cutting out the face images and then ironing them on. I sewed on ppl poms to the white blood cell and germ. I made the cape with fabric and iron on for the letters.