The Ice Bucket Challenge is an activity involving dumping a bucket of ice water on one's head, which was started as a campaign to promote awareness of amyotrophic lateral sclerosis (ALS), and gained widespread popularity in 2014.
The Ice Bucket Challenge is an activity. This activity is involving dumping a bucket of ice water on one's head. One's head was started as a campaign. This was to promote awareness of amyotrophic lateral sclerosis (ALS). One's head gained widespread popularity in 2014.