BLOOD CIRCULATION:
By one estimate, India needs about 10 million units (1 unit = 450 ml) of blood for transfusion every year; considering that the USA uses up around 14 million units annually, the figure for India is possibly much higher.
Across Chennai, there are about 40 blood banks, government run and private, that together collect about a quarter of a million units of blood annually. Even allowing for weekends and bank holidays, that's roughly 25 units every day at each blood bank; in a city of about 7 million people, less than 5% donate blood in a year. With the demand for blood far outstripping supply, it is a challenge to encourage blood donation.
To make it easy for potential donors, several agencies have created mobile blood banks to go around the city, taking the message of blood donation to the people. The pattern is more or less the same - a multimedia show about how blood donation is useful and even healthy for the donor, register the volunteers, do a basic screen and collect a unit of blood. The vehicles must get each day's collection back to the bank, because they only have the collection and storage facilities on board. The high-tech work of screening and storing the blood still happens at centralised locations.
CHENNAI BOOK FAIR:
Chennai Book Fair or Madras Book Fair is an annual book fair organized in the Chennai, India by the Booksellers and Publishers Association of South India (BAPASI). The fair typically lasts for about 10 days during the New Year-Pongal season.
history:
The 1st Madras Book Fair was organized in Chennai between December 14 and December 24, 1977 by the Booksellers and Publishers Association of South India, an organization representing the major publishing companies of South India. The 1st Madras Book Fair had 22 stalls and was held at the Madrasa-i-Azam school. The first six book fairs were successful mainly due to the efforts of K. V. Mathew who was responsible for the growth of the book fair in its early years.
Features:
The Chennai Book Fair is considered to be one of the biggest events in the Chennai cultural calendar along with the Chennai music season. In addition to book stalls, there are food and refreshment stalls to serve the needs of hungry visitors. Regular debates, contests and speeches are held at the venue. In recent times, movie clippings of films of international renown are filmed at the venue of the fair. Annual awards to the best writer and the best publisher are given at the fair.
CHENNAI INDUSTRIAL AND TOURIST TRADE FAIR:
The annual Chennai Trade Fair that happens in Island Grounds is a popular tourist event. You get all round entertainment for the family here - some shopping, rides, booths and government department stalls, etc.
The exhibition presents a panorama of Tamil Nadu - all her places of touristinterest, her cultural wealth and economic progress.
people used to go their during pongal vacation.the site is divided into many blocks each block will represent a particular theme and information,projects based on that will be available there.it also contains many rides,shops,stalls,hotels and many other things.
TRADITIONAL PRACTICE:
kapaleeswara temple is one of the oldest temple in india.during every summer Panguni Thiruvizhaa is celebrated grandly.this is really a classic work in chennai.even though every thing changes but its followed strictly.
The 10 day Panguni Thiruvizha of the Karpagaambaal Kapaaleeswarar temple in Mylapore, Chennai was celebrated from March 26. On all 10 days, Vinaayakar, Kapaleeswarar-Karpagambal, Karpagambal, Murugar with Valli Deivayaanai and Chandikeswarar (Ainthirumenigal - 5 deities) were taken in procession around the 4 Maada veedhis on different vaahanams / vehicles on pallakkus, palanquins, chariots. As an opportunity for the asuras and demons to redeem themselves from their sins and bad actions, they are also used by the Lord as his vaahanams during this 10 day festival.
During the 10 day festival, Mylapore turns into a place of intense activity. Devotees young & old, teenagers having fun with their crowd, merry go rounds & giant wheels for the children to enjoy, vendors with their colourful wares (pottery, toys for children, plastic wares, utensils, accessories, coir items and many others are broungt from far & wide to be displayed & sold in Mylapore). 
Devotees offer their prayers & worship by lighting camphor, applying beautiful kolams on the four main streets as a welcome to the Lord & his devotees, carrying kavadi & pulling tiny thaers.
