Sandscript, A Device That Uses Magnets to Let You Control Steel Balls and Draw Patterns in the Sand
Magnetic Sand | Satisfying Experiment With Small Magnet - YouTube
Dark Iron Sand, Magnetic Sand, Magnetite Sand, Refined Black Sand, 5 Pounds | eBay
Took magnets to the beach and found magnetic sand : r/mildlyinteresting
Amazon.com: YLTIMER Magnetic Hourglass Sand Timer 5 Minute:Sand Clock with Black Magnet Iron Powder&Wooden Base,Lager Sand Watch 5 Min,Reloj De Arena, Hour Glass Sandglass for Office Desk Home Decorative : Home &