Think of Microsoft Sway as a more interactive, more web-friendly Powerpoint. Sway's are easier to share with others as a web resource, and as opposed to individual slides, you can create a resource that can be scrolled through, almost like a web-page.

It still borrows plenty from Powerpoint, chunking your content into 'blocks' that translate to something similar to a slide. Additionally, the editor allows for easy integration of both copyright-free stock imagery. 

Sway is a relatively new presentation + digital storytelling tool from Microsoft. It is also linear, but allows for more kinds of content to be inserted and embedded. It also relies on the concept of 'sections' rather than slides. 

Pros:

• Linear
• Flexible organization through cards
• 'Born' online object is easy to share
• Easily embed images, video, and other web content.
• Table of contents makes it easy to navigate

Cons: 

• Less familiar
• Layout within a card is less flexible - no 'slide' to move content around on

Prezi allows for dynamic - and non-linear - visual presentations using a 'mapping' paradigm. Instead of a beginning - to - end structure, you get what is essentially an enormous posterboard - and instead of slides, you select zoomed-in views of that posterboard. In that way, you can create pages/slides/topics, and sub-pages or sub-slides or sub-topics. 

Pros:

• Dynamic and non-linear
• Visual way of organizing information

Cons:

• Unconventional approach to presenting/designing
• Freemium - extra features require paid subscription

Adobe Express is tailor made for creating colorful and beautiful image and graphics heavy designs - and it comes with hundreds of free templates to get you started. It is well suited to creating static images - think long form, scrollable fact sheets or infographics. Requires a free Adobe ID.

Pros:

• Lots of templates
• Flexible
• Suited towards static, colorful, and rich graphic creations

Cons:

• Freemium - extra features require paid subscription

For a more hierarchical, less visual approach, you could create a website. While there are several commercial platforms available for creating websites, my recommendation for simplest is Google Sites - which should be a relatively familiar interface if you have used Google Docs or Google Drive.  

Pros: 

• Easily navigable by user
• Possibly familiar Google Docs editing
• Family website structure

Cons:

• Less visual presentation