Adding on an option in my wordpress children's website - repost

Hi - My children's website: [login to view URL] is using turbo editor, thus allows me to create the page templates. What i'd need to do is, adding on an option for in the Toolbox for the posts slider/post strip/recent post to display only posts from selected post categories. For example, I could have a post slider showing posts only from the category, Parents Galore Another post slider could display posts from the category Excellent Ideas. Supposedly an easy job. Posts need to show most recent posts. Payment is by paypal only, after work is done, thank you.