Me and my wife want to apply for DV lottery, also I have seven month old son, does anybody know if I have to attach a picture for my seven month old son?
Thank to all.

I don't know if it's required or not. You should also know unless you come from a country with a low number of US visa applications, you're out of luck winning on the DV lottery. I know UK (other than Northern Ireland) doesn't qualify.

Qualifying DV countries

The instructions and information are at the link below. Make sure you only use this site - any others that require you to pay are scams.

http://www.dvlottery.state.gov/