I bought this 3 hourglasses so I can give a break to our children when they were angry times. The hourglasses run 1, 3 or 5 minutes and depending on what they have done they get an hourglass and must alone in the bath as long wait until the clock has passed. Wundebar works, has already works great. They are also very stable and packed in a plastic tube, so if they can fall down do not go as quickly broken. Genial !!!
