OK what's so funny

See the other day, don't know what happened, but Daddy and Ah mah kept on laughing . . . . I was looking around to see what they were laughing at, nothing mah . . . but still the laughing continued . . . "kek kek kek . . . so funny-lah boy . . . " daddy said

Hmmm, are you laughing at me . . .

Couldn't help laughing at Ben Ben's "halo" ~daddy~