Rohana,
would it look like this one?
https://www.redtedart.com/paper-plate-star-twirler/
These swirls could be used in investigative work in the classroom since they are quite like the Convection Snake from this curious minds activity: https://www.sfi.ie/site-files/primary-science/media/pdfs/col/snake_spiral.pdf
which suggest that The children can develop their own questions about how heat travels and test them.