Her approach relies on a soft palette and loose brushwork. Spoor had a talent for capturing movement, seen in works like Drie rennende meisjes in een bos. She avoided the stiff, formal poses common in early twentieth-century child portraiture. Instead, she painted subjects in the middle of an action, such as bathing a doll or rolling a hoop. This focus on candid activity gives her paintings a sense of immediacy.

Modern collectors value these works for their honest depiction of historical domestic life. Her paintings like Twee jongens voor de etalage van een slagerij provide a clear view of street scenes from a past era. The images are quiet and observational. They offer a window into a world where simple toys and outdoor games were the primary forms of entertainment. These prints bring a calm atmosphere to contemporary interiors.