A whimsical cartoon train called "Cell Express" with smiling characters, including a purple scientist, travels through a glowing microscopic cell world.

Cover / First Page "Children’s book cover, vertical 8.5x11, colorful cartoon train 'Cell Express' traveling through glowing microscopic cell world, whimsical lighting, soft outlines, rounded shapes. Nina purple scientist at front with glowing DNA map, Callie yellow-orange with glowing energy coal in 2nd car, Lenny blue with energy bricks 3rd car, Pete red-orange with tools 4th car. All smiling and waving, bright playful colors, educational style, camera slightly above train, magical adventure mood." Page 1: All Aboard! "Inside colorful 'Cell Express,' four cartoon conductors waving: Callie yellow-orange, Lenny calm blue, Pete red-orange, Nina purple, all wearing conductor hats. Glowing cell interior, bright playful colors, soft outlines, cheerful expressions, vertical 8.5x11, camera straight-on, friendly and welcoming mood." Page 2: Callie Fuels the Train "Callie yellow-orange shoveling glowing energy into train engine, conductor hat, big smile, train moving through glowing cartoon cell tunnel, soft outlines, bright playful colors, vertical 8.5x11, camera slightly side view, energetic mood." Page 3: Lenny Builds the Tracks "Lenny calm blue laying colorful train tracks and building protective tunnel walls, small cargo car with glowing energy bricks, conductor hat, smiling, glowing cartoon cell interior, soft outlines, bright playful colors, vertical 8.5x11, camera slightly above side angle, safe and fun mood." Page 4: Pete Fixes and Builds "Pete red-orange inside 'Cell Ver mais