I started with CSoul’s drum and fx track from his Ad Astra remix. From Super_Sigil’s Future Vigil preview file I looped melodic/rhythmic bits from six of the ten pieces previewed (gated). Then I went to freesound to get some ambient sounds -
Children playing: http://www.freesound.org/people/ingeos/sounds/6902/
http://www.freesound.org/people/Tomlija/sounds/105415/
Female vocals: http://www.freesound.org/people/digifishmusic/sounds/65382/
http://www.freesound.org/people/Leady/sounds/26722/
Male vocal: http://www.freesound.org/people/annannienann/sounds/8067/
Bird: http://www.freesound.org/people/reinsamba/sounds/32480/

And I played along with a toy xylophone (stem uploaded).