YES, It is primarily for kids...you guess if you're a ladder, a cheeseburger, a dog, etc. Adults can play this with the kids for sure and it be fun enough. BUT, I purchased this for my kids. Just so you know, the 4 year old pretty much just tells everyone what they are, so ages 6 and up would be what I would consider this game.
6 Headbands are included. We also play the game without the headbands - I hold the card and describe it to my clients (children) to see if they can guess my picture. They now have an adult version without the pictures if you have older clients - middle and high school age. I hope that this helps.
There are two versions of the HedBanz Game. I have never seen nor heard of cards sold separately. If cards are sold separately you might find them at areyougame.com. Otherwise you should check with SpinMaster, the games maker. Good Gaming.
My version only has English. I have yet to come across any card that is bilingual. I'd still recommend it though. It really is a great game, especially if you have kids that get frustrated easily playing games.