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AliensattackinthisLevel2readerandyoungfanslearnmoreaboutthecourageousrobotheroesofLEGO?HeroFactoryastheybattletokeepeveryonesafefromthealieninvasion.,AliensattackinthisLevel2readerandyoungfanslearnmoreaboutthecourageousrobotheroesofLEGO?HeroFactoryastheybattletokeepeveryonesafefromthealieninvasion.Simultaneous.