Photograph from Britannica Online Encyclopedia
This isn't an shopping deal, but watching an eclipse is a completely free, fun family activity. :-)
Tomorrow night (Wednesday, February 20), there is a complete lunar eclipse. The eclipse will begin at 7:43 P.M. Central Time (8:43 Eastern, 6:43 Mountain, 5:43 Pacific). Seventy-eight minutes later, the moon will be completely eclipsed, and will remain so for fifty-one minutes.
The eclipse will be over at 11:09 P.M. Central Time (12:09 Eastern, 10:09 Mountain, 9:09 Pacific), but may still be slightly visible for about twenty minutes.
For more details, check out this USA Today Viewer's Guide.