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Mommy trains me
on how to have fun with her.

Her jokes makes me laughing
with my mouth
fully opens.

They said in wikipedia:

"Children are said to laugh a great deal more than adults:
an average baby laughing 300-400 times a day
compared to an average adult laughing only 15-20 times a day.
Laughter might be thought of as an audible expression
or appearance of excitement,
an inward feeling of joy and happiness.
It may ensue from jokes, tickling,
and other stimuli completely unrelated to psychological state,
such as nitrous oxide.
One group of researchers speculated that
noises from infants as early as 17 days old
may be vocal laughing sounds or laughter,
however the weight of the evidence supports its appearance
at 15 weeks to four months of age."





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