Hi SdB,
I'm going to borrow an answered posted on our Q&A section by our editor Craig on this same topic:
Advice from PTO Today
Craig writes:
The IRS allows you to donate money to another 501c3 charity, particularly if the charity has a mission that ties in with your group's mission. You should check with your state attorney general's office before you make the donation, however, to see whether there are any state regulations on how fundraising money can be spent that would prevent you from making the donation.