Looking for some of those lovely, colored, wooden cubes that are so popular in your favorite Eurogames? Need a bunch to prototype with, but don't want to break the bank? Read on for the skinny on some cheap cubes.
The Magic Word: "Learning Resources"
Hit up your favorite search engine and type "learning resource cubes" in there. You will likely find a variety of results, not all of them entirely as expected. I'm not entirely sure what "snap cubes" are used for, but the item we found of interest is the tub of one thousand, one-centimeter, multicolored cubes for $24 on Amazon.
So they're plastic, not wood. And hey don't have the same heft, and the colors are kind of pastel. And they're for kids, or something.
In a pinch and on a budget, these cubes are great. Just as we suggest you design games, not graphics, fretting over your physical materials at such an early stage is folly! Throw some materials together and get a game working. We use these in the core gameplay prototyping portion of our design workshop: with a single purchase, we have a dozen different colors and enough quantity to support multiple designers working on resource management games at once.
P.S. Check out the "Customers Who Bought This Item Also Bought" section on that item on Amazon, there are a ton of other prototyping supplies on the cheap you probably didn't know existed!