Art and craft supplies at kids camp (Hounslow TW3)

I am a teenager volunteering as an Arts and Crafts teacher at a local kids summer camp.The camp flyer promised activities like beaded jewelry, yarn dream catchers, pompom monsters, and slime making. However, the company running the program only provided us with card paper, crayons, and coloring pencils, telling me to 'improvise.' The kids are already bored of coloring after just 3 days! I really want these kids to enjoy their summer. Any donations of beads, wool, yarn, googly eyes, buttons, slime ingredients, or anything else crafty would be so deeply appreciated. I can collect locally in Hounslow by bus. Thank you so much!