Gee, why didn't I think of that? (cont'd)

You order a couple of books on Amazon, but don't buy quite enough to meet the $25 threshold for free shipping. And good luck trolling the site yourself for cheap filler purchases. Well, there's something called the Amazon Filler Item Finder that pulls up hundreds of low-budget items that take you over $25 - only not too much over $25. Just tap in the amount that you're short. Between $3.40 and $3.61, for example, there's a bunch of usable stuff, including the "Rock & Roll Christmas" CD, a Presto Automatic air vent, and Wilton Dora The Explorer Baking Cups. From the street.com:

Short by a dime? Pick up a 16-cent pack of 25 nylon set screws. Does dad really want a Blu-ray copy of the obscure 2008 Val Kilmer action vehicle 2:22 but the 50-cent shortfall is giving you second thoughts? Turn it into your own little game by sending him the movie with a 50-cent spark plug. You'll not only get free shipping, but the added entertainment value of seeing which one he'll still be using next holiday season.