Conversation Exchange Is more of a tool for intermediate-advanced. Connects you with native speakers, to use chat software, write to each other, or to meet up in person (obviously, supervise your children). Has many languages.
Free. Tandem is a program available via website or app. This will need close supervision, but could provide native speaker support. The idea is that the student speaks with someone who wants to learn English, so basically the two can teach each other. Clearly, you’d want to be extremely careful. There are three sections: the Community, where you search for language partners, the Tutors, where you find lessons, and the Chats, where you view conversations.
Busuu is a website or app. There are grammar units, McGraw-Hill level completion certificates, a vocabulary trainer, and conversations with native speakers available. Free to register and do some lessons. Available in Spanish, French, German, Italian, Portuguese, Chinese, Japanese, Polish, Turkish, Russian, and Arabic.
Find a local class, tutor, group, or club.
Visits to local festivals, restaurants, or stores where there are native speakers.
Visits to church activities or retirement homes where there are native speakers. A retirement home might be willing to schedule a visit from a student, or a group of students, who want to read books together with native speakers.
Visits to neighbors, friends, or acquaintances who are native speakers. Many people are happy to spend a little time with a student. When I was a young child I had a dear neighbor who often invited me over to read picture books to her. She was kind, her children were grown and she didn’t have grandchildren yet, so she was happy to have my company.