The Foundations Starter Collection box with the duplicates and FDC cards removed, used as the base for Baby's First Cube
To make a starter cube out of the box, remove the three FDC cards and the duplicates, then open the three packs that come in the box and find 17 cards that don't appear in the main portion, adding those to create a 270 card starter cube to draft with up to 6. Another 90 cards will need to be added to get up to a 360 that can draft 8.