Polymer Clay, Hardening Method: Oven, Colour: Multicolour
From Amazon
STAEDTLER 8023 C24-1 FIMO Soft Oven Hardening Polymer Modelling Clay - Basic Assorted Colours (Pack of 24 x 25g Blocks)
OnBuy
FIMO EFFECT/SOFT/PROFESSIONAL COLOUR PACKS 12 OR 24 BLOCKS