"Create a playful black-and-white illustration suitable for a coloring book aimed at kids aged 3-5, featuring unicorns in an art studio. The scene should be set in a bright, inviting space with large, simple shapes and thick lines for easy coloring. Imagine unicorns standing at easels, playfully painting with oversized brushes and a palette of basic shapes like circles and stars. Add large pots of paint on the floor and a few simple art supplies scattered around. The studio background should be minimal, perhaps with a big window that lets in sunlight, and blank walls to keep the focus on the creative unicorns and their art.