If laughter is the best medicine then this little kid probably never needs to see the doctor. The teacher is doing a sing-a-long with the students, but when she pauses, he can't control himself.
At first, it's just the boy laughing. But as the teacher plays faster and faster, the boy's giggles become more contagious. Before you know it, the whole room is losing it.
This kid will probably grow up to have a lot of charisma. We hope he keeps this awesome attitude as he gets older!