TFA Dostmann CONTRA - Hourglass - Red color, 1 - Pack

PARADOX HOUR GLASS TFA 18.6004 Paradox hour glass with plastic balls which move from the bottom to the top The Density of the liquid in the hour glass is higher than the liquid which is in the plastic balls. This is why the plastic balls move from the bottom to the top. The colour of the plastic balls is red, The 10-minute sand timer made by friendly high borosilicate glass and acrylic material. and therefore most suitable Timer for Kids, The hour glasses with sand 10 minutes help your kids do things more efficiently and develop a strong sense of time. The hourglass timer 10 minute can be used for cooking, games, classroom, study, desk office decorative and teachers use, The hourglass sand timer is both a work of art and a useful tool for your life. Perfect to help manage work and break times easily, and make it much easier to cultivate children's sense of time.