Amazon.com: Giotto Turbo Maxi Super Washable Felt Tip Fibre Pens, Large Tip Nib 5mm, 18 Assorted Colours, Ideal for Children, Parties and Schools : Toys & Games
Rotulador giotto turbo maxi caja de 24 colores lavables con punta bloqueada : Amazon.es: Juguetes y juegos
Unfortunately I found out too late that you can buy these Giotto pens for dirt cheap on amazon (0,36€/pen). At least the mods I bought look nice. : r/penspinning