Hi man, and wellcome.
In fact I'm a very bad father, anyway...
seems to me things are out of order, if it is the case, some order must be put home!
Nevertheless, I suppose that you feel you are out of control there, in this case, trying to put order will perhaps disrupt an even worst disaster.
I would start to change things at a weekend, staying whith them at a very nice place, in a field or beach... perhaps would be easier contacting one at a time.
I love children, and this part is very easy to me, my problems stems on putting order, but this is anoother story...
To contact your 3 year old is very easy, lay on the floor and stay with her, hug her, kiss her, stay close and pay attention on her, this very few is very much!! ! What she really wants is that you pay attention on her, and she will love a smile to!! !
The son is easy too, remember when you were his age, think in what you liked by this time, and try to be a boy again when close to him, this is great!! ! be a boy for a while and enjoy it together with your son.
The only alert is the following, once you are paying atention at one of them, the other WILL WANT THE SAME ATTENTION TO HIMSELF, this is a strong alert, this will happen, so, a plan, to start, is to stay alone with each one, only to begin, or to ask your wife to take care the other meanwhile you are trying to contact one!
Man, children are great!
Our children are even very better!! !
They are only children once, it is their best time!! !
It is really great to be with them!! !
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Be yourself!