In Islam, suhoor is the meal consumed early in the morning by Muslims before fasting during the month of Ramadan.

Suhoor and Iftar are important to Muslims, especially during the month of Ramadan.

Suhoor is a meal eaten before dawn during Ramadan, when a Muslim is obligated to fast. This meal gives him/her energy so that they will be able to function well the rest of the day.

Iftar is the meal after Maghrib prayer when Muslims break their fast by eating a large meal. They thank Allah for the food that they have and they eat after they have fasted the whole day, from dawn to sunset.

I don't know what tahjhad means but it sure sounds like tahajud. Tahajud is the prayer that Muslims pray in the last quarter of the night in Ramadan. Usually, it starts around 3 and ends right before fajr and suhoor time. In some mosques in the US, the Imam, while praying tahajud and everyone is praying behind him, there are people cooking suhoor for the Muslims to eat. Very fun nights, I've been to them and helped out.

Your age should be when you are young. Some parents like to have their kids at ages 5-8 begin to try but 9+ should be able to fast a full day. Just remember to feed them suhoor so they can last the day.

Muslims are allowed to eat before dawn, known as suhoor, and break their fast after sunset, known as iftar, during Ramadan. They abstain from food and drink from dawn until sunset as an act of worship and self-discipline.