Kids just won't come off these...

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Across
  1. 3. Shooting pedestrians when they have no protection
  2. 6. He repeats whatever you say in a high-pitched voice
  3. 7. Racing as a plumber
Down
  1. 1. Battle royal
  2. 2. A world of blocks
  3. 4. Sucking in suckers
  4. 5. Millions of games all in one