These paper gliders were designed by a NASA Engineer/Artist and are detailed replicas of two of the most famous Jet fighters - The F-14 TOMCAT and The F-16 FIGHTING FALCON. The other two gliders are fun experimental concepts by the artist. These paper planes can be built for display or for flight. They are recommended for ages over 10 or with assistance from an adult. An Exacto knive works best for cutting out and use of either tacky glue or a glue stick is recommended. The assembled models are about 6" long with a wingspan of 5".