Spacewalking astronauts stepped outside Monday night to give the space station's new robot some eyes and a set of tools.

It was the third spacewalk of shuttle Endeavour's visit to the station, each one aimed at putting together Dextre, the giant robot.

The last time astronauts floated out, Dextre got arms. This time, the robot was getting a tool belt and two cameras that will serve as eyes - interestingly, at waist level.

"Happy St. Patrick's Day, guys," astronaut Michael Foreman called out to his spacewalking colleagues.

"I forgot it was St. Paddy's Day," replied Richard Linnehan. "Should have worn the green EMUs." That's NASA talk for extravehicular mobility units, otherwise known as spacesuits.

The robotic work by Linnehan and Robert Behnken should complete Dextre's assembly outside the international space station. So far, the 12-foot robot and both of its 11-foot arms have checked out fine. Each arm has seven joints, and the crew wanted to make sure the brakes worked.

Behnken and Foreman are slated to begin the mission’s fourth spacewalk at 6:28 p.m. Thursday. The two will perform tasks that include a shuttle tile repair test and change out of a circuit breaker on the station.