Angela Lyon
UK
Use empty drink cans with the hole sealed up or photo film canisters - and don't forget a cork life jacket!
The rafts need string and a piece of polythene, as well as the corks. We get
the girls to bring a plastic carrier bag, and supply the string ourselves.
Test each creation in shallow water before use, and make sure the bear won't
get wet - or that it is OK for the bear to get a bit damp.
You can either have a finished raft for them to copy or challenge them to create a raft that will float and is waterproof for the bear.