You can certainly love your children as they are and still be curious about how they will grow. And of course there's no way to predict accurately, but on average, they will be in between the two parents (adjusting for sex):
https://www.mayoclinic.org/healthy-lifestyle/childrens-health/expert-answers/child-growth/faq-20057990
There's no proven way to predict a child's adult height. However, several formulas can provide a reasonable guess for child growth. Here's a popular example:
Add the mother's height and the father's height in either inches or centimeters.
Add 5 inches (13 centimeters) for boys or subtract 5 inches (13 centimeters) for girls.
Divide by two.