The Lighthouse keeper challenge

After being read the story "Lighthouse Keeper's Lunch" the children were challenged too build a way of getting food from a boat to the lighthouse without leaving the boat.
They needed to be able to explain the way the design worked and assess against a set of success criteria.
They were allowed to use any material they could find in the classroom including blocks, lego, paper, mobilo.
They could choose who to work with.
Here are some of the groups at work!

These girls worked out a way to check their boat was one meter away from the lighthouse!