Page borders? I'm not sure what you're asking but you ca use the Rectangle Tool in the Tool Bar on the left to Add a Rectangle around the page.
You can apply a stroke colour by going to Colour Panel and selecting the Proxy for the stroke and the colour you need.
And you increase the Stroke Width by going to the Stroke Panel.
Like a page border?
Making a kids book so doesn't need to be professional.
Most likely you are going to want to create your page border as an illustration of some sort and place it on your master page as imported art. Don't forget to make it oversize for the bleed.
I've found this topic to be helpful to something i'm working on: a quarter page advertisement. I wanted to create a border around my advertisement, filled with a gradient, and was able to accomplish this, but is it possible to give the inner border of the gradient a solid black line? Or do i need to create another rectangle to do this?
Thanks so much,
This is not intuitive, but you can make a custom stroke style of type "stripe" and set the proportion of gap and stroke to anything you want. You can then apply the style to your stroke and apply the gradient swatch to strok and balck to gap, or vice versa, depending on relative sizes and which is inside or outside.
How are you not sure what a "page border" is?
A page border could be a simple as a colored stroke along the edge of a sheet or as complex as a frame made of flowers and fairies, or anything else you can imagine along any number of edges of the page. Page Border doesn't have a standard definition, and what you want will determine the best method to produce it.
Your question was to Eugene (it appears). To clarify, he did not ask what a page border is, he said, "I'm not sure what you're asking".
Peter gave you a very good answer on page borders.
Eugene was trying to get more information from the OP, because those of us who have been doing this for many years can frequently see two or three and sometimes five or six things someone might be asking and we try to seek more information so that we can give the best answer. Other times we might answer what we think the OP is asking and then give a different answer when are told nope, that wasn't it. So getting more info is usually the right way to go.
Hope that helps.
(If not, reply back!!!)