Create a new item and delete item on button press polymer designer

Question

I'm having trouble. I, being the novice polymer user I am, am trying to make

<core-icon-button icon="add" id="core_icon_button7" theme="core-light-theme"></core-icon-button>

to create a new one of these...

<core-toolbar id="core_toolbar4">
          <core-icon-button icon="close" id="core_icon_button6"></core-icon-button>
          <div id="div1" flex>{{ inputValue }}</div>
        </core-toolbar>

while having the close button remove it. I would also like to know how I can make the toolbars have a button like function that switches pages while the add button creates a new page while close removes a selected page.