i have thought of another product a mobile phone i don`t even know if im on the right track.

sorry i know i sound thick but cant get it into my head what im looking for.

thankyou for helping me

I presume you are also Alesha?

As an item the mobile phone can be considered a logical extension of walkie talkies which date back to the 1950s. They wre first a walkie talkie that was connected via the operator. What you might want to consider are what are the problems making a unit so small and having so many working at the same time? Is there anything special 'thinking out side of the box' that was needed.

Have a look at some older versions of mobile phones

http://www.oaktreevintage.com/Cell_Phones_Brick_Old_School.htm

any obvious problems with these that modern phones do not have?