would you like to learn on a boat instead of in a building? there is a special boat which takes schoolchildren along the chao phraya river.they learn about the people who live near the river and they see famous historical buildings.they also see many factories,some of which pump dirty water into the river.the students test the water in the river to see how polluted it is,and learn ways to stop pollution.some parents worry about their children going on the 100-year-old boat,which used to carry rice because they think their children might fall in the water.really it is safe,as the adults on the boat are expert swimmers,ready for any accident that might happen.students say they lean a lot on the boat because they can see,hear,touch and smell what they are learning in a classroom,where there are only words and pictures.