Print them out onto your favourite paper (maybe watercolour??), and use markers, paint, pencils, whatever, to colour them in!
Or you can open the .PDF in an art program like Photoshop or Procreate and colour it in digitally!
What You’ll Get
Image dimensions: A4
Pages: 26 [24 colourable pages, plus front cover and disclaimer page]
Artwork may not be resold or redistributed.
Artworks may be printed out for personal or educational use only.
Do not distribute uncoloured line art to any 3rd party, or display them online.
Coloured artworks can not be sold.
Coloured artworks can be displayed on personal websites or social media, provided a credit and/or link to this product / webpage is provided.
Do not obscure my signature when displaying coloured pages online.