Go to
www.sunsetresorts.com and find your way to the link to their Dominican School project. For several years this company, the owner/operator of The Windsurf Resort in Cabarete, has facilitated precisely the kind of charitable work you are doing. They have gently strong-armed Canadian airlines into donating delivery of items to be distributed to kids.
A business giving back to the community is a good business to support. They can help you. Good luck.