Kerala's capital, most tourists justpass through here to get to the palm-fringed beaches

aller voir le palais d'été des princes du travencore

Go and eat in the restaurants where all locals go, it's much cheaper and tastier! And it's safe, i haven't been sick once.

The airport itself - adventurous! Very nice people though... always helping especially when one's travelling with kids.

coconuts are NOT cheap here... whether its the skin colour of tourists or their accent, coconuts cost around 20-25 bucks... and in delhi, atleast a 1000 km away from the nearest seaside coconut grove, they come for a much more pleasant 10. even in beachside kovalam, you are unlikely to find pocket friendly coconuts.
however, do make it a point to try out the crispy jackfruit chips. these are pretty nice and decently priced.

If you like rice and if you like spice, boy have you come to the right place. Don't be afraid to try the local cuisine; it may not be the norm but it sure is tastey.

Once you're in Trivandrum: Buy whatever you need ant then take a rikshaw and go to Kovalam and enjoy!

Thiruvanathapuram has the most amazing beaches which are always jostling with people from all nationalities. The kovalam beach is the one i remember visiting.
The backwaters are marvelous and so is the south Indian cuisine. You will find the best of banana chips(made of coconut oil ) in here. The locals understand English pretty well and bargaining goes a long way if you are keen on purchasing stuff.

there´s not that much to do in thiruvananthapuram but like one hour away is a big nature sanctuary which is worth taking a look. you can do some treeking or a boat tour there. and the lions "cage" is definitely worth taking a look. broken wire-mesh fence and two female lions fighting 50 cm next to me :D
you don´t really expect the fence to withstand...but like you see, it did!