Americans plan parties for many reasons. As in other cultures, many Americans attend parties for weddings and religious or national holidays. But some parties are especially American. For example, a group of neighbors may gather on their street to eat food, play music and visit with one another. This is called a block party. A woman might invite a group of women to a party called a baby shower for a friend who is about to give birth. Guests bring presents for the new baby. Americans also attend tailgate parties. A tailgate is the back end of a truck or other vehicle that opens down. The tailgate parties are a big part of sports culture in the United States. Friends bring food and drink to a sports event. They eat together in the parking area of the sports stadium. Birthday parties are also very popular. Many parents organize a party for their child around a theme. Birthday parties usually include gifts and a birthday cake with candles. In many parts of the United States, cupcakes have become a popular replacement for cakes. Birthday parties can be low cost or very costly. Some parents take their children's birthday parties very seriously, even when the child is too young to fully understand the celebration. One group of parents started a website called Birthdays Without Pressure. They decided that some parents were under too much social pressure to plan costly parties for their children. The group sees this movement as an example of America's culture of "too much stuff". The group's website gives suggestions on how to keep birthday celebrations simple, meaningful and fun without spending a lot of money. Their advice may be very helpful during this period of economic recession  . The purpose of Birthdays Without Pressure is to advise people to   _  .
relieve people's pressure have meaningful birthday parties with low cost make birthday parties meaningful and costly spread America's culture