What do i need to get into the mexico by south padre and back in the same day?

Question

me and my friends are going to south padre and we want to to go to mexico but no body knows what we need

Answer 1

If you're just going to Matamoros, drive to Brownsville and park close to the bridge and walk across.  You may need a birth certificate and drivers license for ID.  But Matamoros is used to people coming across the border for shopping and restaurants.

As you come into Brownsville look for 14th Street.  Make a right turn. This street will turn into Sam Perl Blvd. Sam Perl will end at Mexico Blvd just a few yards from the bridge.  If you park somewhere along Sam Perl, you can walk through the customs building and across the bridge.  Then you'll be in a nice shopping/restaurant area.

Answer 2

You mean legally to drive cross the border?  You'll all need ID (driver's license) and proof of citizenship (birth certificate); or passport.  

If you're flying, you'll all need passports.