Paul K. Guillow, Inc. - your one source for balsa wood airplane kits and flying toys since 1926. From the Fokker triplane to the Sopwith Camel of WWI to the P-51 Mustang and P-38 Lightning of WWII to the modern day F-15 Eagle fighter jet you will find that our balsa airplane models appeal to both the young and the “young at heart”. Who doesn’t remember those shiny red propellers on his favorite toy airplane!