Visa may be a mandatory requirement for anyone to enter India, including children.

 Visa may be a mandatory requirement for anyone to enter India, including children. One should ensure its possession before getting to enter India. Tourists from other countries are advised to see current applicable visa fee/visa extension fees with Government of India Tourist Offices or Indian Consular Offices located in their respective countries. The visa must be obtained abroad from an Indian Mission. If getting to visit a neighboring country like Nepal then re-entering India, a double/multiple entry visa should be obtained. Tourist visas are issued for one month, six months or five years. Tourist visas are often extended by three months at the foreigner's registration office in New Delhi , Mumbai, Calcutta and Chennai, or, with the Superintendent of Police at any District Headquarters. If your stay within the country exceeds 180 days, then tourists are required to urge a tax clearance certificate, available at the foreigner's section of the tax department in every major city. it's also advisable to stay bank receipts to point out that the cash has been changed legally. However, the overall requirements for visas are:

http://www.juntadeandalucia.es/averroes/centros-tic/41010198/helvia/bitacora/index.cgi

1. Original passport valid for a minimum of six months

2. Correct visa fee

3. Two recent passport-size photographs (five photographs just in case of Pakistani nationals)

4. Supporting documents, where necessary

5. Duly completed form (Pakistani and Bangladeshi nationals got to apply on special application forms)
http://mcdonaldauto.ning.com/profiles/blogs/things-to-do-in-kerala
If your visa formalities are completed, now you want to have a bird eye view of this vast subcontinent in order that you ought to not face any problem while traveling to any parts. India forms a natural subcontinent with the Himalayas to the north. The Arabian Sea and therefore the Bay of Bengal, which are sections of the Indian Ocean , mislead the west and east respectively. India's neighbors are China (Tibet), Bhutan and Nepal to the north, Pakistan to the north-west, and Burma to the north-east. To the east, almost surrounded by India, is Bangladesh. Near India's southern tip, across the Palk Strait, is Sri Lanka . India has 28 states with constitutionally defined powers of state . The 28 states are: Andhra Pradesh , Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Manipur, Maharashtra, Meghalaya, Mizoram, Nagaland, Orissa, Punjab, Rajasthan, Sikkim, Tamil Nadu , Tripura, Uttar Pradesh , Uttarakhand, and West Bengal . There also are seven Union Territories including the capital Territory of Delhi, administered by Lieutenant Governors or Administrators, all of whom are appointed by the President. The Territories of Delhi and Pondicherry even have elected chief ministers and state assemblies. The Territories are: Andaman and Nicobar Islands, Chandigarh, Dadra and Nagar Haveli, Daman and Diu, Delhi, Lakshadweep and Pondicherry.

Special permits could also be required additionally with the visa to go to certain areas of the country. Certain parts of the country need special permits before they will be visited. Such areas where special permission is required are as under:
http://franck.lintanff.free.fr/dpt/index.php?post/2008/08/26/Et-ca-continue-encore-et-encore2
Arunachal Pradesh, Mizoram and Nagaland

These States/Union Territories are designated as protected areas and foreigners cannot enter these areas without special permits. These permits are issued by the Under Secretary, Ministry of Home Affairs, Foreigners Division, Lok Nayak Bhavan, Khan Market, New Delhi 110 003 a minimum of 4 weeks before the date of the expected visit.

Sikkim

Certain areas of Sikkim like Gangtok, Rumtek, Phodang and Zongri in West Sikkim and Pemayangtse are excluded from the inner line and declared as restricted areas. After getting permission, individual tourists can visit Gangtok, Rumtek and Phodang, Zongri and Pemayangtse. The duration of stay has been raised from 7 to fifteen days. Permits are often issued by all Indian Missions abroad, all Foreigners Registration Office (FRO) and therefore the Foreigners Regional Registration office (FRROS), Immigration Officers at Airports at Mumbai, Calcutta, Chennai and New Delhi . Manipur has also been opened to foreign tourists; permits are often issued by all Missions abroad, all FRROs, Home Commissioner, Manipur, Imphal. The duration of stay has been raised from 3 to five days. Permits are not any longer required for Darjeeling, Assam, Meghalaya and Tripura.