Zig Zag Pencil
A plastic pencil is put into a case. The pencil can be seen through cutouts in the case. Performer slides the middle of the case to the side, cutting the pencil into three pieces. The pieces can be removed from the case! Performer then slides the middle section back, and takes the pencil out of the case- it's back in one piece! Completely automatic, and suitable for young magicians.
See Video Performance Below: