Need alittle help on my project please.Please!Thankss?

Peace be unto all of you.Salamu Alaikum How is everybody?Inshallah good.I have a Technology Encyclopedia project to do.I have to pick atleast 10 topics.And these have to be things that teens and children use today.For example,these are what I chose:twitter,iPhone,Yahoo Messenger,Youtube,Rhapsody,Facebook,text talking,iPod,Aim,and Google.I know what they are, it is just that in my Project i have to tell what they are to a person that knows nothing about them.I need to tell what they are in atleast 4 sentencess.I also need to tell how to use them, to a person that knows nothing about them.(Yes,Wallah,I should be in school right now but I have the stupid fever,I also have bad luck.)I need to know how to put them in a wording style for somebody that knows nothing about them.Thankss.I appreciate it.