What does it take to...

What does it take to get Sebastian to laugh like this? It takes a while for an infant to be able to smile socially. Before reaching that stage, there are "buttons" we can push to get him to use those laugh muscles. Laughing surely is hard work.

(1) Tapping his hands like crazy while making high-pitched sounds
(2) Cheek-to-cheek kisses
(3) Burying my head in his chest
(4) Holding him up above my head
(5) Putting his hands together (which seems to amuse him once he discovered he's got two hands)
(6) Bombarding him with impossible human-made sounds
(7) Smiling and talking to him

He is one friendly and affectionate boy!