October’s Science Saturday at the Duxbury Free Library features a cool mixer for kids of all ages who wand to witch it up with some pre-Halloween alchemy – an all-in-good-fun Witches Brews Sensory lab. From 11:30 am to 12pm, on Friday the 18th, the Children’s Room at the library will have covens of sensory-exciting ingredients for kids to mix together, creating their very own potion. This magical BREWhaha does require registration so fly to the library’s website to sign up.