Cathryn and PJ are 4 yrs apart, he is now 15m old and she is just now paying attention to him, At first she was very fustrated because he couldnt do anything, now that he is crawling, and in the walker they do alot more together, It took alot of explaining to her that right now he cant do alot with you, but before you know it, he will playing with you, I got floor toys and she would lay down with him and that started it.