Depends on the 6th graders and many of them are not too little by the way. Kids were smaller when I was a kid but I'm way off topic.

I know that younger people nowadays are very into touching things because a lot of what they do is visual and interactive. If they could touch those bonnets and things like that they will respond more positively. If you don't have pics large enough to see you could pass them around. Again they touch everything.

Watch them closely though, there is always one in the bunch that steals. Not that I'm bashing kids but I used to partake in cultural demonstrations where we had 1000 kids a day from ages 5 to high school.

Food is a dangerous thing to get involved with because of food allergies and cultural restrictions. If the school allows it then label everything clearly. In addition the numerous peanut allergies there are a lot of kids allergic to gluten/wheat products now as well.

Is that a rural, suburban, or urban school? Suburban kids are the picky eaters in my opinion whereas rural and urban kids tend to come from poorer families and are less prone to having a million restrictions.

I think you will have fun and it will be interesting. Talk with them not at them and they will respond in a carefree manner.  If you openly admit to not being in the know about what goes on in their world they'll fill you in and in turn they will be receptive to hearing your speech. Like one of the things I have said was like "hey before I get started does anyone have an xbox or playstation?" Then I make up something like I'm having a problem with my controller what should I do to fix that?  After they tell me how to fix it I start my speech on my culture, by then they are cool with me because I treated them like an adult and not a baby.

 P.S. I don't have a playstation or anything like that but I know they like them and I have to find a way to connect.