Using secondary data that are already available (and free) is a lot easier than collecting your own information. You can gather secondary data on a subject from many sources, such as the Internet (articles, stories), magazines, publications, etc.

If you were developing a new robotic toy, what type of secondary data might you look for to help you determine who would want the product and what they would want in the product, how they want to learn about the product and where they want it to be sold, etc.?