WAUKESHA, Wis. (CBS 58) -- Students are coming together in honor of a Waukesha athlete who died unexpectedly in March. 

Kai Lermer was a junior at Waukesha North High School. His classmates held a fundraiser at Sky Zone trampoline park on Tuesday, calling it Flying for Kai. 

The business promised to donate 40% of the day's profits to Kai's family if 100 people came out to jump. 

"That's gonna go toward the Kai Lermer Foundation, which is a foundation that provides training to what he had and CPR and everything," said classmate Izabella Jones. 

Kai suffered from an undiagnosed heart condition called Wolf Parkinson's White Syndrome. His classmates hope to create a memorial in his memory. 

A GoFundMe page has been set up for the family.