What made your baby laugh for the very first time?

[mamaintraining]

Hi all, just looking for some inspiration to make my LO laugh (she's 4 month old now). What made your babies let out their first giggle?

My DS1 who is 26 now first let out a laugh at about 3 months when he was swimming he also gave me his first smile at 6 weeks in the pool too.
My DD2 who is 24 now first let out a massive shriek at about 3 months when I was bathing her and put bubbles all over my face as I had added too many to her bath.
My little water babies 👶

Me having a sneezing fit he thought it was hilarious. Husband then did exaggerated pretend sneeze and he laughed for ages a proper belly laugh,

Generally funny noises still always make him laugh, monkey noises , high pitched noises etc

Also long hair tickling him when I lean-over him although he now loves to really pull it from my scalp when I do that. So I'm not so keen.

Doing the zip up on his snowsuit whilst he was in it for the first time 😂