(Mình sẽ viết về truyền thống xin kẹo trong các lễ hội Halloween ở mọi nơi trên thế giới)
Children dress up and then visit the houses in their neighbourhood asking for a ‘trick or treat’. The neighbour gives them sweets or money as a ‘treat’. If there is no treat, the children play a trick on the neighbour, for example they might throw soap at the window. Some people think that playing tricks is unkind but luckily there is nearly always a treat! This custom is imported from the USA and is more popular with young people than with adults. The police in some parts of Britain give out 'No trick or treat, please!' posters for people to display on their door on the night of Halloween. Young children usually go trick or treating with parents or with an older brother or sister.
Halloween is a holiday for makeup and Western countries including Asian countries. Of course there is the whole country of Vietnam. On this day, the children will be dressed as characters monstrous .Then the kids would come and knock on doors to ask for candy .This is a special holiday.
Mình chỉ viết được ngắn thôi 
Halloween is usually celebrated amongst family, friends and, sometimes, co-workers. Many children dress up in fancy costumes and visit other homes in the neighborhood. At each house, they demand sweets, snacks or a small gift. If they do not get this, they threaten to do some harm to the inhabitants of the house. This is known as playing 'trick-or-treat' and is supposed to happen in a friendly spirit, with no nasty or mean tricks being carried out. However, if your children take part, it is important to accompany them and to check their 'treats' to make sure they are safe to eat or play with.