
das Bildchen
small picture
A small picture, photo, or small illustration. It is the diminutive form of 'Bild' (picture) and is often used for collectible pictures, small stickers, or photos of small size.
Die Kinder tauschten auf dem Schulhof bunte Bildchen aus ihren Sammelalben.
The children traded colorful small pictures from their sticker albums in the schoolyard.