Build a product listing base with products in a given category. You will gain knowledge about APIs relevant to efficient loading of products and categories from Ucommerce, as well as dealing with prices and simple discounts.
In Category.aspx.cs, map the Products property on the CategoryProductModel to hold the list of products in CurrentCategory.
Bonus
Display product images using Kentico APIs. Does the ProductModel contain enough fields to do so or do you need to add extra fields? Remember to view images you should make use of ImageService.