I want to click on a gameobject and select all of its children. How is this possible?
I don't believe there is a shortcut, but you can write an editor script to do this if it's really that much of a hassle to shift select a bunch of children
there is an example here: https://answers.unity.com/questions/1773802/how-can-i-select-whole-object-with-its-childrens-i.html
however, the functionality here may need to be fine-tuned, as it recursively grabs all children which you may not want. I am also not confident in the script's ability to select multiple parents and then grab their children.