You can find the books on the Volteletras website, and if you would like to buy all the rest of the materials, you can do so by writing to
komunikazioa@gookapi.com.
Please note that the mugs, the backpack, and the Gookapi books include augmented reality that brings the characters to life.
Shipping costs: €3.15.
Mug colors: Red, green, yellow, blue, and orange.