The 3 minutes sandglass is plastic measuring tool. It comprises two glass bulbs connected vertically by a narrow neck that allows sand from upper to lower and the process lasts for about 3 minutes. They are perfect for timing, games, exercising and so on. The hourglass is also a wonderful decoration for your home and office.Feature- Color: Yellow.- Material: Plastic.- Size: About 2.5x2.5x9cm.- Made of environmentally-friendly plastic, higher hardness, stronger toughness, more environmentally friendly and safer.- The sands can flow from the to the bottom, and you can over it, then start again.- Perfect to decorate your home and office, great as a gift to children and friends.- This hourglass doesn't measure exact time, just for kids to play with.- They are perfect for kids brush teeth, games, exercising and so on.- Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you