Will I be charged for using Twitter on my phone?

[Sincerely, Alison.]

I don't have a data plan, but I do have unlimited texting. I'm not really that into Twitter, but I think it'd be cool if I could update it on the go. My mom would freak out if I got charged for this though, so how does it work? Would Twitter charge me for texting them? And, do you just text what you want your update to be?
Help?thanks.
And I have Sprint, if it makes a difference.

[troy c]

I believe you would be charged internet access to go on twitter.. but it might have settings that you can alter that will allow you to send a regular text to twitter on your personal updates.. like facebook and myspace.. im not sure..worth a shot thogh!