Hello Doctor, My son is 2 years old. At night he's not sleeping early. He's sleeps around night 11 to 1 Am. (He's very active around that time. He wants to play). He even wakes up early like around 8 to 9. Even he's plays outside and he's active overall in a day. He's sleeps like 2 to 3 hours afternoon from 2 to 5. Should I reduce afternoon sleeping like to 1 hour? Is another nap other than night sleep is mandatory for kids? Please suggest . Thank you