Hope the Twins are doing Grey't... Most important in raising babies is stability and their assurance that a meal is coming the same time each day, now that you've shone them they have nothing nothing to fear, it's training time. Their not to young to start, they just won't learn to much. I feel the most important command for a Grey is the step-up, step-down command. When your playing with these guys, whenever you put your finger in front of them, push it againest their chest, and say, "step-up", don't expect anything, your just getting them used to the words and sound. Now is also the time to socialize them, get as much daily outside contact with others that you can, others don't have to hold them, just be near them, touching them, and talking to them! Remember to change out their fresh food every couple of hours, same with water, and "Keep up the good Work....Jayd