Cassie and Jesse live in California, where they go to school and play with their friends just like any other kids. But after school this sister-and-brother team explore the world of science in their new series, PopSci Kids! Cassie loves to spend her weekends building computers, operating robotic dragons, and bringing cool new inventions to life using whatever she can find in her mom's kitchen or toolbox. Jesse is all about Lego engineering and chemical reactions! Under the careful supervision of his big sis, he loves to blast things into space and get slimy.