Art therapy at Coloring-for-Kids.com: Geometric Concrete Mixer coloring page is a coloring book and an exciting travel hobby both in print and online. Coloring allows you to reveal the potential of the child and develop his unique abilities through the freedom of creativity. A young artist will be able to create a personal collection of finished works and share the beauty with friends! Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.