【S064】Experiment Kit: Cold Pack - Let's Make a Cold Pack That Gets Cold When You Knead It! Educational Toy Experiment #sachi's Educational Toy Series ♥ Instant purchase without comment is OK ♥ ♥ Change to Mercari delivery (with insurance) is +100 yen ♥ This item will be shipped via regular mail. After shipping, in the event of non-arrival or postal accidents, I cannot provide any guarantee or support. Please rate the item as received even if it doesn't arrive. Recently, regular mail has been delayed, so I recommend Mercari delivery because of the anxiety. Mysterious Experiment Kit Let's make a cold pack that gets cold when you knead it! Easy experiment kit. As a project for summer research or self-study Also, as a communication tool for parents and children How about it? You can enjoy learning with a mysterious experiment. #ExperimentKit #ColdPack #Science #EducationalToy #Toy #Experiment #Education