If I remember correctly, you must go to the hut that Basho lives in (found if you keep on going left after the market). There will be a short bridge consisting of three rocks and on the very first rock you see, there will be a bag of mortar. Once you click on it (or rather land on it), it will be put into your backpack. Use the mortar to fix the bridge.
On the bridge
you have to get cement to fix the bridge then you fix the bridge ITS EASY!
go to the hut in the west of the city and get the mortar, go to the bridge and help the man repair it
You get it by the old man writing an haiko, (Basho) Then you finish the bridge by the peices in the right place.
you find it on red dragon island
you use the mortar at the great bridge to fix it
No, you just get to fight the red dragon at the end.
The answer is red dragon.
alot!
you use it on the bridge
You use the mortar to put the blocks together.
The newest island on Poptropica is Red Dragon which is opening soon. (I have no idea when, sorry!)