Complex sentence: He was an inventive child displaying excellent mechanical skills, having invented a disintegrator gun, an anti-gravity gun, and other devices; he and Gomez created the computer named Whizzo and the robot named Smiley (played by Robbie the Robot).
Split into simpler sentences: He was an inventive child displaying excellent mechanical skills, having invented a disintegrator gun, an anti-gravity gun, and other devices. He and Gomez created a computer named Whizzo and a robot named Smiley (played by Robby the Robot).