There is some mortar at the lake house at the far left of the island. Place the blocks so that they fit the shapes of the other blocks.
in red dragon island
go to the hut in the west of the city and get the mortar, go to the bridge and help the man repair it
Near by the prison
te cagas
you use it on the bridge
On the bridge
you have to get cement to fix the bridge then you fix the bridge ITS EASY!
You have to put the blocks into the bridge (obviously!) If you want to know how to get the bridge up, then you speak to one of the men on the bridge. You will find him eventually.
You will have to fix the bridge by putting the correct bricks in the space it tells you.
You put it on the bridge with all the workers where there is a crack.
you use it to fix the bridge
you use the mortar at the great bridge to fix it