kelley tuthill from our boston station shows us what's cooking. >> reporter: when the danver high school marching band got an opportunity to play in the rose bowl parade, the pressure was on to raise money. >> i believe the students collectively sold over 8,000 pounds of fudge. it was just incredible. >> reporter: but now the department of public health has set its sights on fund-raisers involving sweet treats, including the all-american bake sale, igniting a schoolyard debate. >> and it helps the schools and helps buy books. helps fund trips. it helps fund, you know, things that's the taxpayers aren't paying for. i mean, that's the purpose. >> i think there are lots of creative ways we can, you know, come up with for fund-raising that wouldn't have to involve unhealthy foods. >> reporter: this is all part of a state law that goes into effect in august which tries to limit our kids' access to unhealthy food from a half an hour before the school day to a half hour after it ends. but the department of public health wants the ban on sweet treats to extend 24/7. its new guidebook it says sch