On Slide # 2, go to INSERT>Online Pictures...
Search for a picture for "birthday" or "birthday cake" or "present" or something related to birthdays and [Enter] to apply.
Uncheck the box for "Creative Commons only" and go to Filters...
Filter by "Transparent".
Select one you like and Insert.
Resize and position it in the center like this...
Repeat the same steps but this time Filter by 'Clip art'.
Repeat the steps for something in your 'don't like' list.
The rest of the slides should be good quality pictures from the internet.
For each comparison slide, insert 1 picture for each list.
You should get a good quality picture for each bullet on your slides. Resize and rearrange them to fill up the slide.
You need to get your pictures checked for quality before moving on to the next stage/animations!
Your slides should look like this: