This hourglass is delicate in appearance and personalized in design. This glass sand is clean and transparent, safe and non-toxic. This clear glass sand timer can be used as a visualization tool to help infants and young children directly understand time and the outside world from the visual senses. This can help them understand the concept of time more quickly and receive information from the outside world. This pure sand glass is made of high transparency and high temperature resistant high borosilicate glass, which is of excellent quality and fine workmanship. This elegant modern design of the hour glass is the perfect modern home and office decoration item. It can be used as an elegant and noble accessories embellish the space.