heres a 2nd TNT idea the tnt house items: wooden planks 3 stacks of 64, glass 8 TNT 2 stacks of 64, wooden door 1 and 1 lever
first get the TNT and wood like this w=wood t=tnt L=lever
wtw
wwwL
g
www
thats just for the walls :) only put 1 glass block on 1 wall same with the lever
entry way
wtw
www
d
www
wtw
floor as seen from side
wwwwwwwwwwwwwwtt
ttttttttttttttttttttttttttttttttt
this is good for killing greifers
also make it look like some one lives there so there's a trap >:)
build away from other buildings