The following are links that can assist coaches with drills and exercises for young soccer players.
Coaches Manual (included practice plans etc)
http://www.ucs.mun.ca/~dgraham/manual/
Training the very young child (U7 and below)
http://www.ucs.mun.ca/~dgraham/manual/Pages/Very_Young/v_young_training.html
A good place to start and get some info for coaching.
http://www.soccer-for-parents.com/soccer-practice.html
Great drills etc for players of all ages
http://www.soccerdrills.net