Raft Play Day 4

1. Build a water purifier
2. Build a grill
3. Build a cup for water
4. Build fishing rod to get fish for food
5. Build bed to pass the night 
6. Build a hammer to expand/repair your raft
7. Build a spear to defend your raft from shark attacks
8. Build a research table
9. Expand raft
10. Build a sail

The best feature of the raft is the second floor. It allows for more space and safety from shark attacks. Also using a ladder to get up saved me space as well instead of using stairs.