WARNING ERROR!
Post # 3 is not the Colle system!
Post # 3 is the Stone Wall Attack!
The Stone Wall Attack's signature pawn moves are d4 and f4 as white.
The line is similar to the Dutch Stone Wall which is played with the black pieces with pawns on d5 and f5.
The Colle System is the below line.
The move 3.e3 is a signature move of the Colle because if the dark square bishop was to move.
The position would turn into another line entirely.
It would turn into a relative line of the Colle.
If the move 3.Bf4 is played the position is known as the London System.
Which I have wrote an article about.
http://www.chess.com/blog/X_PLAYER_J_X/london-system
If the move 3.Bg5 is played the position can turn into either the Torre Attack or the Trompowsky Attack.
So as you can see the Colle system, London System, Torre Attack, and Trompowsky Attack are all family friendly lines.
I would recommend any and all of the above lines to beginner players!
Have a good day!
Yeah I know right