Disappointing walk in the forrest and bamboo raft on lake was relaxing as not very interesting with no sights to see, you could easily nod off to sleep!
There isn't much to do in Thekkady. You can visit the Periyar Tiger Reserve but don't count on seeing tigers! There is a boat ride on the lake and you may see some elephants, deer and birds.
There are some shops in Kumily town but prices are sometimes ridiculous so always bargain. One night stay should be more than enough.