Done by a 10 year old girl in my workshop using watercolor pencils and acrylic paints on sketchpad. Drawing is a good visual exercise. It allows children to capture the lines and shapes of objects and sharpen their skills in understanding scale, colors, and nuances. Doing actual objects like their toys is a good challenge especially the Petshop series of miniature animals because they can draw larger than life (bigger versions) for them to capture the cute designs on it!