I have been living out in the country for as long as I remember, and We have had this slow connection internet for about 12-13 years now and I have always wanted to expirience internet on my wii and ds/3ds for a year or two now and I wanted to ask if wi-fi was worth it (they are 30-35 bucks idk if I should buy one and what would work my my internet connection.

well if you want to send wifi to stuff then you should get faster internet but if you dont mind realy slow then just buy a router

Uhm, actually, you're asking 2 questions here. Or rather, your question has 2 parts that you should consider when answering - I'm not going to answer the question for you, but I could help you make the decisions yourself (hopefully)...

Getting Wifi, in itself, has little to do with your internet connection. The only thing that could be a factor, is HOW you're connected to the internet.
If you have a dialup connection, Wifi would probably make little sense (unless you have a separate phone line for the dialup connection).
With any kind of dedicated internet connection, the speed of your internet connection is not (really) a factor in your decision to get Wifi.

Now, with Wifi, you set up a wireless local network, within your home. Devices that use Wifi (3DS, Wii, PC, etc.) connect to that local network.
The local network doesn't even have to be connected to the internet to function, but the devices connected to it will probably expect to see an internet connection somewhere in the network.

Also, the network speed of your local (Wifi) network is independent of the speed of your internet connection. But don't overdo it and get superfast Wifi, if your internet connection isn't up to it (it doesn't do any harm, but you're just spending a lot of money and not getting much in return - the slowest connection in the network will always the fastest speed you'll get across the network).

Ok, so much for your local network (if it was up to me, and I'd have multiple devices that would want to connect to the internet, I'd say "yes, set up a decent-speed local network").

Now for the other (unasked) part of your question. Should you upgrade your internet connection?
THAT is something only you can answer. If you're happy with your current speed, there's no real need to spend extra money on that.
However, as I stated above, it would be easier to have a dedicated internet connection, because you're never sure anymore when a device in the local network may want to access the internet, and dialing out "at will" could become costly in itself. So that could be a factor to take into account.

Other than that, it really is all up to you.
Balance cost with benefits (and I hope my explanation is any help with that), and don't make your local network (much) faster than your internet connection - unless you intend to upgrade your internet connection later...

Wow talk much? lol but seriously Asfarn makes some good points. As for me I only have Wifi only because I have a laptop computer, so if your Wii and 3DS are the only reasons you want Wifi, then it's up to you.

Well, it wasn't a question that could be answered with a simple "yes" or "no", was it?

Anyway - as a programmer - I'm used to people not giving me all the information needed to make a decision, so I usually return the question and fill in the gaps with extra questions.
Generally, it helps the person asking the original question to ask a better question, and me to answer that question.
Or, in this case, it helps the person asking the original question to come to a decision that I can't make for them.

For myself, I have Wifi because I have a desktop PC (actually, it's a big tower stuffed UNDER my desk), 2 laptops (big one / small one) and a tablet PC.
The 3DS was "just another device" to connect.
Also, having so many devices connected wirelessly, I found it paid having a wireless printer/scanner as well (although strictly, a wired network printer would have worked just as well - and it would cost the same, so why not go for the wireless option).

i ment this but simpler

Thanks a ton asfarn, I think we have dial up ( phone service is waaaay to slow for us.) Well I guess I might as well get a netgear router. I think those are the cheapest routers I can think of. I am not getting it ONLY for my wii and 3ds though, I will use it on my laptop too. One more question though. We have our Big huge tower gateway computer that is on it's last leg (only less than 1 gb left) But if I setup the router on my laptop, could I connect the router to my dial up after? My dial up box thingy is connected to my laptop and my gateway.

No problem. Glad to help.

I'm not quite sure I understand what you're asking here, but I THINK you're asking if you can use your laptop to set up your wireless network, and then connect the desktop later?
Sure, not a problem.

In fact, it doesn't matter which computer you use to set up your network, as the network doesn't "live" on that computer, it "lives" on the router.
It may, however, be easier to use a "wired" connection during setup, as it eliminates having to wirelessly detect a network that hasn't been set up yet. You could still use your laptop for that, with a simple UTP cable.
Once the network is set up, the wired connection can either be dropped altogether, or switched to a computer that doesn't have wireless capability (like your tower?).
With the network configuration complete, all other computers should have no problems connecting to it.