Please help with my individual product "image gallery"

Hello team

wordpress - using woocommerce. Theme "simple mag"

I need help making each of my shop products, image gallery, actually a gallery. Right now if they click on the image it opens in the same window, exiting them out of the screen. This is not good.

Take a look here, click this link:
http://chasinunicorns.com/shop/green-goddess/

click on the on of the other product images to see what I mean. It links to here:
http://chasinunicorns.com/wp-content/uploads/2017/02/IMG_3111.jpg

Someone please help! Need to make a gallery slide show ...