As one of its daily deals, THAT Daily Deal offers 100 Glow-in-the-Dark Pebbles for $5.99 with free shipping. That's tied with last week's mention and the lowest total price we've seen for such pebbles. (It's a current price low by $5.) These acrylic pebbles glow for approximately two to three hours after full sun exposure and can be used to mark a path or highlight a flower bed. Deal ends today.