Casual collections often seem to migrate to windowsills. It seems they're a natural display space: Is it because abundant natural light highlights their surfaces? Because they're at window openings that make it feel like you're showing your collection off to the world just outside?...

These are just a few casual collections gathered on windowsills:

• 1 a small hand-drawn collection, via Sebenta
• 2 figurines in a row, via Sid the Gramophone
• 3 a rock collection, via Apartment Therapy's What's in Your Window Sill?
• 4 a glass collection catches the light, via NYSD