Disha used her index finger to indicate that she wanted more of something before her tatha (grandpa) taught her the number two. She is so fond of two now, that everything she notices somehow becomes two aani (elephant), two brushee, two mummum (food).
She noticed an octopus in one of her books and counted its limbs as 2, 2, 2, 2 and finally pronounced that it had 2 legs or taal (as she says it).
Exactly, three days back, she picked up 3. From where she got it, we don’t really know. Now her counting goes 2, 3, 2. As a dear friend observed, Disha’s counting system is a way of saying “one more” or “another”. So the words two or three for Disha is a means of saying just that and probably does not mean counting the number of things as we know it.