Tom Sachs, Space Program: Mars

The Enterprise doesn't open to the public at the Intrepid until July, but astronaut wanna-be's can get their space travel fix at "Tom Sachs: Space Program: Mars," on display at the Park Avenue Armory's 55,000-square-foot Wade Thompson Drill Hall. Kids can view real spacecraft, watch a "lift off" to Mars and see what the landscape is like on the fourth planet from the sun. Children under 10 are always free, but admission is gratis to all on Tuesdays between 4 and 7pm. Ages 5 and up.