Funny, we eat so many General Foods cereals,(Cheerios, Fiber One, Kix, Cheerios, Cookie Crisp, etc..) I still send in Box tops to the elementary school our daughter attended.. even though she is a senior in College this year..
Also anytime the Ziploc bags are on sale I purchase them too..
Back in the day when I was baking for events, I would purchase the mixes or cookie dough with the box tops and send those in too..
Remember, you never HAVE to participate in this stuff.. I used to only purchase what we really were using.. I also asked neighbors and families members to keep it in mind in case they ever came across any of the things the school collected.. it adds up fast.
Also if you want to help but do not really want to send in box tops.. . Volunteer to organize and count the Box Tops.. They will really appreciate your help..