Build a raft and then get it across a lake?
He was the one who thought of building a raft to help with the fishing.
If only there were trees on this place here we could build a raft.
The two men had already built a raft, which lay near the edge of the water.
In another day or two the stream would probably be wide and deep enough for him to try building a raft.
Maybe he could build a raft to hold the supplies.
We'd talked of building a raft, and following the river across the continent.
They begin to build a raft to escape the island.
"Do you guys agree about staying here tonight and building a raft tomorrow?"
"Is there a place anywhere around that we can find trees to build a raft?"