The fruits of this parenting labor are watching them grow into the people they'll eventually become - seeing their interests and passions develop, and being able to foster and cultivate those is such a special experience. My son has always loved music, and watching him learn new songs on his guitar, hearing him sing, and witnessing his excitement when he masters a new skill is really something special.
My daughter, on the other hand, has a passion for animals and nature. Taking her to the zoo or on hikes and seeing her excitement and genuine curiosity when she discovers new things is incredibly fulfilling. Those little moments where you see them so engaged and happy - that's what makes it all worthwhile!