If your daughter is anything like my little sister you are probably going to be switching up the decals quite often. Why not opt out for static cling decals? Here's a link. http://www.customwindowclings.com/
It means you left the window open
Almost all types of window decals are legal in the UK, because they don't really care on what kind of windows you have, as it's not pertaining to danger. Cheap ones can be found on eBay, but it could be from Hong Kong or Shanghai.
You can get them from Vista print for $10. You can also gain a lot of other items that you might need for you business, including business cards, and other items including t shirts, letter heads, and pens.
Yes, you can purchase custom wooden blinds from many places, including Home Depot and online sites like Select Blinds which is used on the show Extreme Makeov
In certain circumstances (eg Trains) it can be as there is a danger that you could be injured. However sticking your hands out of your bedroom window would not be illegal.
Window louvers can be found at JCWhitney. Window louvers could also be custom made. One can get more information on window louvers by their local car dealer or manufacturer.
If you are good with do it yourself projects, you could install a bench in your bedroom window. My advice would be to visit a local DIY store in your area. They are generally quite good at providing advice for your DIY projects.
12x12, make sure you install a large escape window in it or the first closest window too the bedroom. In most areas it is a code that a escape window is installed. If it is a code and you don't, you could face criminal charges if anyone gets hurt or dies because of a fire. Plus code violation charges and your insurance could deny coverage for non-inspection.
You can probably find some different types of decals at sabre scorpion or you could just get the brickforge ODST armour which already has decals applied to it
The shopping website www.amazon.com offers over 100,000 different decals and stickers for automotive use. For larger, commercial decals, try www.edecals.com.
No, but it is highly recomended to have one. As Louisiana gets very hot and humid during the summer that air circulation could be very important.
You could create a custom duvet through Drapery and Beding to match with whatever shade of green of your liking.