Yes, this can be done in VB.
Which object depends on what you actually want to show. I would start by drawing out what you want the app to look like (on paper!) and how the user would go through the app. For example, I'd draw one page with the question cards and then another which showed
the results.
Once you know how you want the design to work you can start thinking about which controls can implement that.
You will likely end up using some sort of Panel (such as a Grid) containing Image controls and TextBlocks for the question cards. The answer could include a TextBox if the user needs to type the answer, but for younger kids Buttons with answers may
be better.
I'd start with the "Get Started" link at the top of the page and walk through the tutorials to get an idea of the sorts of things you can do. Also give the "Design"
link a spin. The
Developing apps (C#/C++/VB) has an overview of the controls and lot of Quickstart articles you'll find helpful.
--Rob