If you are planning to do a boat trip on the Koggala lake be careful to not get ripped off. The Ayurvedic products sold in the spice garden are ridiculously high priced and the cinnamon sold on Cinnamon Island is a scam. The cinnamon rolls mould after a view days. If you open the package you can see that only the outside rolls are really cinnamon rolls. Inside is just wodden rubbish. The cinnamon powder contains only little cinnamon and more normal dust.
Better buy your spices and Ayurvedic products in a trustworthy shop.