singapore math textbook for all students?

[Cutie Patootie]

I'm switching from Horizons math to Singapore and I can't figure out if I need a textbook for each child (6yo and 8yo) or if one textbook would be fine for the two of them. They will both be starting out with 1A.  Anyone know?  Thanks!

[moominmamma]

The textbooks are non-consumable so there's no reason they couldn't both use the same one.

Miranda