Switch main product image when clicking on a variation thumbnail on Wordpress site

On three pages of our Wordpress based website we want the ability for a user to click on a thumbnail of a color swatch which would then switch in a full size pic in that particular color. One of these pages is [login to view URL] and the other two pages are for the Mixy 30 Planter and Mixy 40 Planter as accessed by the LHS menu. So the effect that we are seeking is like that shown on page [login to view URL] , but we are not programmers so cannot implement this solution ourselves. On our Mixy 60 page we will have about 35 color swatches/thumbnails and we already have the 35 corresponding large images that we need to swap in and out which are identical apart from the middle panel. On the Mixy 40 pages we will only have 8 colors. For the Mixy 30 we will again have about 35 colors but they will be the same thumbnails as for the Mixy 60. Only the main picture is slightly different. We will supply all main pictures and thumbnails. We just need the code created and installed on the relevant Wordpress pages. Because far too many potential freelancers never even read a project description before making a bid, you MUST include the words ‘Planter images’ in the first line of your bid response or your offer will be deleted immediately.