Outschool上免费的Author Series好像还不错（每月都会有）

Join us for our April author visit with Eucabeth Odhiambo who will discuss her book She Persisted: Wangari Maathai. This special event is part of Outschool’s celebration of Earth Day; learners will get to hear about Wangari’s incredible and inspiring efforts to reforest land in Kenya for which she received the Nobel Peace Prize.
https://outschool.com/classes/authors-series-nx9UlnkC?sectionUid=d6c65c18-4aef-4c30-beb0-99472908839c&showDetails=true&usid=bq0dXnwK&signup=true&utm_campaign=share_activity_link

虽然是70+人的大课，还能有机会像作者提个问，小朋友还蛮开心的 Learner Community 经常会有免费的活动，有兴趣的可以关注一下