For an in-class project, I need to find a place (in BKK) that sells seeds.

Probably best if the seeds are beans or corn. Something easy and fast growing.

Need to get some potting soil too as we will grow in cups to try different conditions.

thanks

The black beans and kidney beans (red beans) are available at Lotus and big C, and have worked well for me. They also sell potting soil. I used plastic egg containers (cut off the flat side) for the initial sprouting, then transplanted to cut off water bottles and used bamboo skewers to let them climb. Another good twist is to plant many seeds at the same time and each day or so remove one and photograph against a dark background paper to make a photo sequence of the seeds growth. I used mine to make a PowerPoint show and have used it for classes three years running.

Another idea is to plant in various types of soil (sandy, clay, loam rocky, etc.), underwater and overwater some specimens and shade or eliminate light as much as possible to show the need for good light for many plants.

I've used those little green ones, I think that they are called Mung Beans. They grow very quickly: If you plant them on Monday they will sprout on Tuesday and be fully grown by Friday!

They were already in the Lab, so I can't tell you where to buy them. However, I would guess that they can be found at Big C or Carrefour. You should also be able to get potting soil there.