Buckets of beach sand can be found by taking sand next to Reyna in the Build A Beach event. They must be taken to one of the other sand piles in the crater while dodging the quick sand and sandnadoes. Clicking the buckets prompts a message telling to which pile they should be deposited at.
The pile of sand always produces enough buckets so that the player holds fifty. Getting stuck in the quick sand makes one lose ten buckets, and getting caught in a sandnado makes one lose all that they are holding. Exiting the crater area also makes one drop all the sand.
A total of 500 buckets can be deposited each day. Each deposited bucket counts as one unit of beach sand turned in.