Ideas to raise money for Charity ?

I am hoping to go on a charity trip to cuba next year and need to raise £2500. I have been stuck for ideas I just want small one so that I could do in a small group or alone any help please ?

Thanks
Update: In Cuba we are help animal conservation making the animals habitats better and making sure they can survive we are looking at Turtle Mannatees and coral reef life. its a charity called operation wallacea. And i need ideas that wont cost anything I have so far contacted a local school and they will do a non... show more In Cuba we are help animal conservation making the animals habitats better and making sure they can survive we are looking at Turtle Mannatees and coral reef life. its a charity called operation wallacea. And i need ideas that wont cost anything
I have so far
contacted a local school and they will do a non uniform day
car washes-failed
Grant letters
Rafflle ticket sales
and contacted the media for advertisement and i have only made £10 !!! :(
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