childish scribble

Translations
детская каракуля
The wall was covered in childish scribbles.
Стена была покрыта детскими каракулями.
Definitions
A childish scribble refers to a drawing or writing that is characterized by hasty, unrefined, and often chaotic marks made by a young child, typically lacking in precision and detail, and often reflecting the uninhibited creativity and exploration of a child's artistic expression.
Words
childish

adjective
детский
scribble

noun
каракули