Eid is a festival that Muslims celebrate after Ramadan which is a month of fasting. There are two Eids, Eid-ul-Fitr and Eid-ul-Azzha. When it is Eid, Muslims have a day off to celebrate and they go to their relatives' house to see all their relatives. Children get lots of presents like Pakistani clothes, toys and money. We eat lots of food and we celebrate the end of the month of fasting. Fasting is when you go without food or drink from dawn till dusk and it is very hard for Muslims.
Muslims do this because they are showing Allah that they are grateful for the food that Allah has given them and so they can feel how the poor and the hungry feel.