As of Jan 2006, NParks guided walks at the Pulau Ubin Sensory Trail will no longer be free. Charges will be $60 per group of maximum 15 persons.
Currently guided walks are provided free by trained guides. Beginning 1st January 2006, free guided walks for the Sensory Trail will cease.
From the information on the NParks website, it seems unclear if groups of less than 10 will be able to enjoy these guided walks and at what rates.
Still, the sensory trail remains free for individual exploration and all the plants are well labelled with sufficient details and even have braille letters as the park was originally designed for the visually handicapped.
For more information, see: