The Scarecrow suggests they build a raft to float across the river.
Explore these websites and videos to find out more about rafts.
In past times many people around the world built rafts to cross rivers, carry goods from place to place and even cross seas. One tribe in Peru even turned their rafts into islands to live on.
Find out more details about life on the Uros Islands.
Nowadays, whitewater rafting is a popular extreme sport, like this on the Colorado River through the Grand Canyon.
Challenge yourself!
Can you design a raft small enough for a Lego sized person out of recycled or natural materials? Think about what materials can float well and are waterproof. Try it out in a sink or bath. Did it float?
You can also look at the Help with Challenges page to come up with your own raft challenge.
