Medical and orphanage volunteering

I am heading out to Asia in February to volunteer in Sri lanka, India and Bali on medical placements and in orphanages. While I am out there I will have the opportunity to help out in the slums of these countries where children are deprived of an education and basic healthcare, let alone the luxuries we are lucky enough to have here in Britain. The organisation I'm travelling out with; Plan my Gap Year, does a great deal of work to set up clinics and slum schools to give these children some chances, so they can one day escape poverty having gained the skills needed to have a more promising future. However, the charity's help is limited which is why I'm hoping to raise money for PMGY in order to donate supplies and funds so that they can set up more projects and support more children and families. Anything which you can spare will be greatly appreciated and be a huge help to the organisation, thank you!