15 ноя 2004 г. - Cognitive Development 4 years 6 months I throw a fit because my brother has 4 pieces cut of one hot dog and I only have 3 pieces. Even though they are the same, my conservation of matter is not developed and I don't realize the difference.
Добавлено на ленту времени:
Дата:
15 ноя 2004 г.
Сейчас
~ 20 г назад