Modern Art Therapy: Caring Hippos (difficult) coloring page is an online game and printable coloring book that never ends. Just one click, and an exciting game begins: on paper or on a computer screen, phone or tablet. Be sure to praise the young artist! Are your young artists ready to color? Invite them to create and create unique drawings soon! Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.