Each pamphlet has a different set of recommended yarns. The following are from the King Cole version.

Materials
Double Double Knitting
Cloud 99
2 balls

Zip Crepe
3 balls

Carelon Machine Washable Double Double
3 balls

Ripplespun
4 balls

Stitch holders.

When knitting with Ripplespun use size 5mm needles instead of 5.5mm needles.