Children intent on reading a spelling book

The painting depicts an interior of a house furnished with 19th-century furniture in which two children with a blue apron, with a bored and melancholy attitude, are leafing through an illustrated spelling book. Both of them are leaning with their elbows on a table covered with a red damask cloth. One child is kneeling in a lyre chair with red upholstery, the other one is resting his feet on a stool. On the floor there's a tambourine with clappers.