215 PAPER CHAIN LINKS
I was so impressed by this powerful project from OV Jewitt Community School is Winnipeg, Canada, inspired by LINKED.
These 215 paper links represent the 215 unmarked graves of Indigenous children found near a Canadian residential school. The grade 4/5 students noted that, at the rate of 215 links per day, it would have taken them 76 years to reach 6 million.