These doodles are where ideas begin, experiments in line, movement, and form that sometimes evolve into finished designs.

Want to see these doodles in action? Follow @susanrcastillo on Instagram to see them in motion.

Hand-drawn sketch of a horse's head and mane, facing forward with detailed facial features and flowing hair.
Black and white abstract drawing featuring a horse's head with flowing mane and various geometric shapes and patterns.
Green tribal-style tattoo design of a chameleon on white paper.
White swirling abstract design on a dark background, resembling a stylized wave or cosmic scene with stars and swirls.
Black and white drawing of a skull with three large, hollow eye sockets, detailed shading, and surrounded by an irregular outline.
Black and white abstract drawing featuring spiral and wavy patterns resembling a stylized shell or whirlpool.
Abstract black and white swirl drawing with intricate, flowing lines and spirals.
Black and white drawing of a curled-up lizard with detailed scales and textured features.
Black and white sketch of various tall, rounded cacti with spines and star-shaped patterns on a plain background.
A hand-drawn geometric design with concentric rings of diamond shapes and a smaller cluster of diamonds in the center, with some disjointed diamond shapes extending outward.
Watercolor painting featuring a dragon, a butterfly, and a floral border on the left side.
Black and white abstract swirling pattern with intricate curves and lines.
Colorful pencil drawing of a dragonfly with pink and purple wings, surrounded by five pink flowers with yellow centers and a green leaf.
Hand-drawn illustration of a sunflower with a large yellow bloom, green leaves, and two birds perched on its stem, set against a light background.
Colorful illustration of a cute creature with a dragon-like tail, wings, and horns, sitting on paper with a textured background.
A drawing of a black swan sculpture with an orange beak, perched on a green striped pumpkin, sitting on a large, striped, yellow, gray, and white pumpkin against a yellow background.
A watercolor painting of a bee on a bouquet of white daisies with yellow centers, set against a light yellow background.
A hand-drawn picture of a dog with exaggerated facial features, including large eyes, a big nose, and a tongue sticking out, sitting on grass.
Line drawing of a leaf with multiple leaflets attached to a central stem.
A pencil drawing of two cartoon cats with large eyes and striped fur. The cat on the left is sitting with paws on its lap, labeled 'Meo,' and the cat on the right is standing, labeled 'Moch,' with a playful expression.
Three black and white striped feathers drawn with ink on a white background.
Black and white illustration of an eagle with wings spread wide and a hawk with wings wrapped around it.
Black and white intricate line drawing of a stylized bird with decorative patterns on its body and wings.
Black and white sketch of a bird with detailed feathers and a stylized profile.
Abstract black and white ink drawing with flowing, curved lines and patterned details.
Abstract black and white swirling and curling lines creating a dynamic pattern.
A colorful drawing of a plant with multiple blue and purple flowers with yellow centers and green leaves.
Hand-drawn illustration of a tree with blue flowers and green leaves on a white background.
Black and white drawing of intersecting wooden lattice structures on a piece of paper with spiral binding on the left side.
Hand-drawn illustration of two yellow birds with long tail feathers perched on tree branches.
Black and white abstract drawing resembling a jellyfish with long flowing tentacles.
Black and white abstract drawing of a wave with swirling lines and patterns.
A black and white sketch of an owl's face emerging from a hole in a tree trunk.
Black and white drawing of a stylized phoenix with intricate patterns on its wings, tail, and body, set against a plain background.
Cartoon illustration of a pumpkin with a face, arms, and legs, flexing muscles, standing on grass, and holding a smaller pumpkin with a face. Text below reads "Pumpkin King."
Sketch of a stylized rose created with geometric, angular lines.
Line drawing of a single rose with layered petals and a stem.
Simple black outline drawing of a maple leaf on beige background.
Black and white abstract swirling pattern with various spirals and curved lines.
Abstract colorful scribbles with pink, blue, green, and gold lines on a black background.
Abstract black and white swirling and curved lines creating a psychedelic pattern.
A black and white line drawing of a fish with intricate geometric and abstract patterns on its body and fins.
Hand-drawn illustration of a swan with its head bent downward, set against a light blue background with water at the bottom.
Black and white tribal-style illustration of a crab with detailed legs and claws.