There are a many ways of producing a minor pentatonic scale. Here are two, one that uses intervals and one that uses the minor scale:
Intervals: Pick any note, then jump up a minor third. Then, a major second, another major second, and yet another major second. From there, jump up a minor third. You've just played all the notes for the pentatonic scale of the note you began on. See below:
Starting note: C
+minor 3rd: Eb
+major 2nd: F
+major 2nd: G
+minor 3rd: Bb
If you add another minor second, you'll end up on C again.
-Minor Scales:The minor scale has 7 notes, and "pentatonic scale" literally means "5 note scale". In the pentatonic scale, these five notes are a certain distance away from each other. To create this from the minor scale, you just have to remove the second and sixth notes. See below:
A Natural Minor: A B C D E F G
A Pentatonic Minor: A C D E G
Done! Now you're ready to play blues solos and sing folk songs (and a million other things..).