For our colors I used Jacquard Textile Traditional Exciter Pack. I added about 2tlbsps of water to each squidge of color - I also mixed some colors - so there was a whole array of cups for my little one to pour.
Pouring neat circles onto dry fabric was problematic.
We tried a paint brush to make the shapes.
Would spooning the paint on work better?
Spoons didn't help. The fabric needed to be damp to enable to paint to spread in an easy fashion. Out came our favorite spray bottles. My little one happily sprayed water all over the place.
We found the easiest way to make nice circles (and bear in mind this is a four year old) was to pour a little of the dye on the sheet and then use the base of the cup to spread the paint into a neat circle.
If you haven't seen it - here is the designer version and our still wet version beside it. I'm actually really looking forward to quilting this - I think it will be a fun project to quilt.
Our other kid painted fabric projects have included: