You don't have to be a rocket scientist to build one of these svelte spacecrafts. All you'll need is the right stuff: cardboard, glue, tape, and a big dose of aeronautic creativity.

Pour a small amount of quick-drying tacky glue into a jar before you start. Use a shipping tube for body of ship. Cut three fins out of corrugated cardboard, and then cut three slits into bottom of tube (slits should be as long as straight edge of each fin). Apply glue to straight edges of fins, and slide them into tube slits; secure fins with masking tape while glue dries. To make nose of ship, tie a pen to end of a piece of string. Measure circumference of tube with string, then lay string against edge of a piece of thin cardboard with pen at one end. Holding string's midpoint firmly in place, draw a half circle with pen (as you would move a compass). Cut out half circle, and then fold it into a cone; secure with glue and tape. Glue cone to top of ship, again taping to secure pieces. Once dry, remove tape,