Mainkan sesuatu yang absurd. Buat gerakan-gerakan lucu. Cobalah menghasilkan suara-suara yang lucu atau nyanyikan lagu. Cobalah permainan fisik yang melibatkan banyak sentuhan serta suara-suara lucu.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Babies as young as 9 months know when something's amiss.  For instance, if you put a pan on your head, your kid will realize something's wrong and will likely find it funny. Try funny faces. Pull funny faces by making your eyes wider and pulling out your lips or sticking out your tongue. Your kid will find it silly and funny.  Babies that are 6 months will find this especially hilarious because they think anything silly or out of the ordinary is funny. Try different noises to see what your baby