The Ice Bucket Challenge went viral about four years ago, and raised $115 million to fight ALS.  Now something called the “Lemon Face Challenge” is trying to do the same thing for another good cause . . .

You have to eat a lemon wedge and record yourself reacting to how sour it is.  Then you challenge at least one other person to do it.

It’s a little easier than dumping a bucket of ice water over your head.  But if you don’t want to do it, you’re supposed to donate to a group called Aubreigh’s Army to help fight DIPG.