It starts whenever you are ready for it to start.
Toddlers typically start counting around the age of 2 or 3.
Birds typically start to sing in the springtime, as it is their breeding season.
Cats typically start breeding around 6 to 9 months of age.
Cats typically start mating at around 6 to 9 months of age.
Babies typically start counting around 18 to 24 months of age.
Babies typically start producing tears around 1 to 3 months of age.
Cats typically start shedding their fur at around 6 months of age.
The codon typically used as the start codon in protein synthesis is AUG.
Children typically start 1st grade around the age of 6 or 7.
Children typically start coloring around the age of 2 or 3 years old.
Babies typically start to count to 3 around 18 to 24 months of age.
Toddlers typically start walking backwards around 12 to 15 months of age.