Does anyone know of any big Toyshops (Toys R Us) in LOS?- Bangkok/Korat area's. Or does anyone know, if one of these big trampoline's that you see here in England, are available to buy in Los?

Try this link

http://www.toysrus.co.th/inside/Location.htm

Good Luck

could try central department store.
i know central bangna (bangkok) has a toyshop in it.

Robinsons on Sukumwit has a toy store as does Emporium.

Big C and Lotus also seem to sell a lot of toys etc

Cheers
ash