Hi Gina, to set up the slider in Funki, your sticky posts need featured images that are at least 990px wide by 420px high so they’ll fit properly in the slider area.
Currently, your sticky posts’ featured images are not big enough.
This one is 400 by 300:
This one is 600 by 522:
Try replacing these with featured images that meet the 990 by 420 minimum and you should be good to go. You can learn more about how to set up Funki in the theme showcase.
Just let me know if you need further help.