The Science Encounters Activity Set is a great way to get your kids interested in physical science, without all of the messiness that comes along with experimenting. The kit comes with 12 imaginative creatures that are made of all sorts of materials – some are magnetic, some are squishy, some are hard, some float, some sink. There are also six interchangeable attachments to explore how these properties can change. An activity guide is also included for parents to use to help their kids learn and explore. Keep working on this kit with them and your little ones will be ISEF contestants in no time at all. The Science Encounters Activity Set retails for $24.99 at ThinkGeek.