macaron 5/10/15/30/60-minute sand clock timer, exquisite ornament for student study, creative gift

3 minutes 5 minutes 10 minutes 15 minutes 20 minutes 25 minutes 30 minutes 45 minutes 60 minutes 3-in-1 bamboo/wood style: blue 1 + green 3 + orange 5 minutes three-in-one bamboo and wood style white 1 + gray 3 + black 5 minutes

pink green blue purple orange 3-in-1 bamboo/wood style: blue 1 + green 3 + orange 5 minutes three-in-one bamboo and wood style white 1 + gray 3 + black 5 minutes