The Dragon cargo ship, operated by the private spaceflight company SpaceX, arrived at the International Space Station on Sunday morning

It's not exactly the Easter bunny, but a commercial Dragon cargo ship built by SpaceX made an Easter delivery to the International Space Station Sunday (April 20) to deliver tons supplies, and possibly even some treats, for the astronauts on board.

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The roboticDragon spacecraftarrived at space station Sunday morning, floating within reach of the orbiting laboratory's robotic arm. Station astronauts used the arm to capture the Dragon spacecraft as both spacecraft sailed 260 miles (418 kilometers) above Egypt and the Nile River.

"Great work catching the Dragon," NASA astronaut Jack Fischer radioed the station crew Mission Control in Houston. The station crew then carefully attached the Dragon cargo ship to a docking port on the station, completing the job in just under three hours. [See photos of SpaceX's Dragon launch and station arrival]

The Hawthorne, Calif.-basedSpaceXlaunched the Dragon cargo ship toward the space station on Friday (April 18) using its own Falcon 9 rocket that lifted off from Cape Canaveral Air Force Station in Florida. The mission is SpaceX's fourth Dragon flight to the space station and third of 12 cargo delivery missions under a $1.6 billion deal with NASA.

The Dragon spacecraft is carrying 5,000 lbs. (2,268 kilograms) of food, supplies and gear for 150 different experiments. A miniature lettuce farm, space robot legs and laser communications system are among the delivery's highlights.

Bill Gerstenmaier, NASA associate administrator for human exploration and operations, said Friday that he wasn't sure if those supplies included any chocolate eggs, jelly beans or other Easter goodies for the station crew.

"It'll be a surprise for all of us when they open the hatch," Gerstenmaier said. That hatch opening is slated to occur on Monday.

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SpaceX Dragon capsule makes Easter delivery to space station