Related by context. Frequent words. (Click for all words.) 37 Blast Off 35 Astronauts aboard 35 Rocketry 33 Clapping 32 SpaceX Falcon 9 32 Obstacle Course 32 Astronaut 32 Astronauts 31 robot 31 rocket 31 Mars Rover 31 Space Elevator 31 Shuttle astronauts 31 Leap Frog 31 NASA JPL 31 Robotic 31 hay maze 31 Space Exploration 31 Metcalf Lindenburger 31 spaceship 30 Commander Eileen 30 International Space Station 30 NASA astronaut 30 Megan McArthur 30 astronaut 30 spaceships 30 rocket propellant 30 Tether 30 astronauts 30 rocketry 30 inflatable slides 30 Unmanned 30 Hula Hoop 30 NASA 29 inner geek 29 moonwalks 29 simulated 29 simulator 29 hula hoop 29 Lego blocks 29 LEGOs 29 launcher 29 aboard 29 Segway scooter 29 scavenger hunts 29 Science 29 Launch Vehicle 29 Applause broke 29 Discovery astronauts 29 Space 29 spacemen 29 lunar lander 29 Hokey Pokey 29 Shuttle Atlantis 29 Buzz Aldrin 29 MyPyramid 29 Shuttle Discovery 28 Schoolchildren 28 robotic spacecraft 28 preschoolers 28 lunar rover 28 Leland Melvin 28 astronauts aboard 28 Jenga 28 Intergalactic 28 brainteasers 28 remotely piloted 28 drew oohs 28 Ares IX rocket 28 Twister 28 Two spacewalking astronauts 28 Simulator 28 yo yos 28 robotics 28 Simulations 28 Rocket Fuel 28 moonshot 28 Hoshide 28 Mars orbiter 28 Space Invaders 28 Robots 28 Robonaut 28 Endeavour astronauts 28 MULE 28 TacSat 28 Munching 28 puzzle solving 28 Handlers 28 interactive exhibits 28 arcade 27 Koichi Wakata 27 space shuttle 27 schoolchildren 27 Launch Pad 27 outer space 27 Centennial Challenges 27 Apollo astronauts 27 Nie Haisheng 27 Tic Tac Toe 27 XCOR Aerospace 27 suborbital flight