All General Admission passes get access to the vendor hall, panels, any nonticketed activities, and a Collectible badge.

Any Premium pass holders can view the perks in the link above.

Yes, you will need your pass to get into the show.

Badges can be picked up at any point during the show. 

Any child under the age of 8 years old does not need to purchase a pass to enter the show.

Any child over the age of 8 years old will need a pass to enter the show.

As long as your badge is visible and correlates with the day you’re attending you shouldn’t have an issue.