How old was your baby when they first giggled and what was it that made them laugh?

My 6 month baby smiles and squeels so effortlessly when dad plays with him. When ever I try I have to work so hard to get the same reaction! I've mostly been successful with peekaboo. The actual baby giggles are like rare pokemon. I get that I nayurally give out comforting/nourishing vibes and dad gives fun-time vibes, but I want to be fun mommy too!

How old was your baby when they first giggled and what was it that made them laugh?