coqui frog solution

[Cindy Blankenship]

I've been comtemplating making removable window plugs (just for sleeping and just in my son's room since a loud fan will probably suffice for me and he gets migraines). But the mat is expensive and I'm not sure if it's all they say it is. The company claims that most noise enters through windows rather than walls. And that the plugs made with their soundproof mats will eliminate 90 percent of thisn noise. Whatcha think?
http://www.soundproofing.org/sales/prices.html
Or do you think there's anything at Home Depot that would do just as well?
Thanks!
Cindy