how to make a homemade walky talky?

[jordie]

me and my sister want to talk but not use our cell phones, i know retarded.
but yeah, and i dont mean like go out of the house.
are rooms are by eachother and i tried to do the cup thing, but i think i did it wrongg.
how would we talk without using a phonee?
AND without being loudd.
duuuuuude not the soup can thingg,

we dont have soup cans handy. (:
OMG. we have laptops.
but its called i can't be on it at 11 at night on a schooooool night

[Girly_girl114]

That's what phones are for.
Get computers in your rooms and Instant message each other.
ha.
BUY walkie-talkies.

[eamor]

my sister and i used to pass notes under our doors

[missFABULOSO]

2 soup cans, 1 string.