Dough Clay, Hardening Method: Oven, Colour: Blue
From Amazon
STAEDTLER 8020-305 FIMO Soft Oven-Hardening Polymer Modelling Clay - Pastel Aqua (1 x 57g Block)
The product is available from £2.81 at international stores.
Hobbycraft
Fimo Soft Aqua Modelling Clay 57g