Podcast:Who Smarted? - Educational Podcast for Kids Published On: Wed Mar 16 2022 Description: What is plastic made of? How was plastic invented? What are ways plastics are both good and bad for the environment? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.