Thanks guys;
Houston_TX: I wont be in Houston in that weekend. i went thro. ur link but didn't find any interesting place to visit.
papillion: off course i will try NASA center.
PeaceLover, Rocker: i heard that too. Galveston is not so good. but i will try that to.
TechGuy: thanks for ur suggestion.

Any other place to go??beside Galveston n NASA???