Hourglass for kids and adults: The timer can be used to help kids and adults build a visual concept of time in many situations. Help to manage time well, such as game, bath or bedtime etc. Various sand timers: including 4 different color sand timers. Yellow, green, blue and red, for use at home, in the classroom or in the office, etc. Please do not scratch the glass to prevent the words from falling off. Counting time: 3 mins, 5 mins, 10 mins, 20 mins. Please allow 10% time deviation as the timer is not a mechanical clock. Suitable for counting time, adds more fun and game atmosphere. Well-made sand hourglass: The timers are made of durable PVC and high borosilicate glass, and flowing sand slowly. Not easy to break under normal use, please don't drop it from high. Widely Used: Great for kitchen, home, classroom, game, office, study, timer exercise, many applications. During timing, sand timers can be perfect for decorating your home and office.