Review on Hourglass Yueton Sandglass Management Intensity by Sarah Brown

I love the variety in this pack: the colors and the different time durations. Hourglasses are so useful in the classroom and with children in general that I bought this set to take home. They are plastic but will hold their shape well with regular use. I wouldn't recommend using them for anything other than an hourglass - I wouldn't advise kids to chew on them or stand on them, but they're durable enough for what they are. They work well, but I haven't timed them to make sure they are accurate to the second. They really shouldn't be for my use.