B’sha’ah tova! Such beautiful memories I have of that time…
Include your son in just about everything. Allow him to overhear you telling your new baby how lucky he/she is for have ing such a special big brother…and that your big brother makes such good choices and has such good middos…
Ask “eitza” from #1 son, maybe which outfit to put on the new baby, or “bubbela, do you think the baby would like a toy, will you help pick something?”
Ask big bro to perform maybe a new song he learned, because he knows so much more than the baby –
Enjoy this time, it goes by too fast. B”H every stage can be enjoyable – its up to you to set the stage.