These are rafts made of light balsa wood, so buoyant as to be used in coasting voyages.
"The Andes and the Amazon" by James Orton
A canoe formed from the trunk of a large tree, generally cedar or balsa wood.
"The Sailor's Word-Book" by William Henry Smyth
Some have Balsa Wood bodies.
"How to Tie Flies" by E. C. Gregg
Thor Heyerdahl and five crewmen leave Callao, Peru, on a balsa-wood raft.
Kites, including micro kites (five inches diameter), rotating box kites, shaped kites, and balsa wood gliders, rubber band powered helicopters, parachute balls, and other nostalgic flying toys will be available for sale.
Then I create a model of the building from balsa wood or foam core, and I use silicone to cast a mold from that model.
Seeing the old classics (Legos, pogo sticks, balsa wood gliders, etc ) always provides a pleasant reminder of childhood innocence.