Fans make the plants stronger and also helps keep bugs off them. Get one as soon as you can, its one of the cheaper items but also rather essential.
You can make one out of an old computer fan . Simply wire it up to 1 12V transformer (phone/mp3 charger...) and you're done Fans also increase air flow so thats greatly beneficial
I bought two small desk fans at walmart for 6 bucks a piece. They each require one AAA battery. Maybe be something you should look into because from my research, fresh air flow is very important.
Ya get one asap. I bought one as soon as my sprouts popped up above the soil and i can already tell the stems are strong.