Safety Sand Timer for Kids The mini 2 minute sand timer is made with friendly high borosilicate glass and acrylic material, lead-free and chromium-free. And each one has a number of time marks. easy to distinguish which timer for which usage. Best Time Management Tool The economical combo pack includes hourglass of 1 Minute, 2 Minutes, 5 minutes. Each Sand Clock measures 1.1 X 5 inches. The toothbrush timer for kids 2 minutes help your kids do things more efficiently and develop a strong sense of time. The 2 min sand timer can be used for cooking, games, classroom, study, desk decorative and teachers use