Most banks and savings and loans will cash these for you. There are also websites that can give you the current value of the bond by simpy imputting some information from the bond. You will need identification and a social security number. You will be responsible for paying tax on the interst.
Its very simple to cash in series EE bonds just take them to the bank and you will receive your funds. As with any bonds their may be tax consequences most likely for state income tax. Of course the name on the bonds must match with the person redeeming them.
There is really not much involved. You must take the bond you a bank where you have an account at. You will fill out the back of the bond. The teller will get you the value of the bond and a 1099-int.
Series EE bonds are bearer negotiable goverment issued savings bonds. If you are the bond holder, take the bonds and a valid form of identifcation to any local bank for redemption. You can also redeem bonds on behalf of a minor or deceased bond holder with proper documention.