The images on the following three slides were created entirely in PowerPoint using the various shape, text and filter tools available. Feel free to use them royalty free and without limitation. All the images have been grouped so if you need to edit them just ungroup , overtype and edit as needed. I recommend regrouping the images after you edit and then right-click and save them as .png images before embedding in your course. Just a nifty looking interface. You could assign some actions to those buttons at the top, or just leave them there for visual purposes only. There are both Mac & Windows look and feel buttons at the top so simply delete the one’s you don’t want. This bubble looks much better when placed over the top of something. The images on the following five slides were created in PhotoShop and are intended for white backgrounds. My apologies but they are not transparent. I personally created all these images so you can use them royalty free with no limitations.