LavaKids Aquathon is a swim/run event on the Saturday before the Lavaman Triathlon. It takes place in a protected lagoon at the Hilton Waikoloa Beach Resort.
Short course for ages 7-10: 100 meter swim, 1k run.
Long course for ages 11 - 14: 200 meter swim, 2k run. 
Keiki Dash is a 1k run for kids 6 and under. 
Lavakids is an 501c3 nonprofit organization. All event revenue goes to support youth development in sport in the local communities of Hawaii Island.