Active participation in online education for young learners

Hello,
during the online lessons I recognize that my students do not participate after 15 minutes. What can I do to involve the students in the lesson and make them more active.
I'm waiting for your suggestions.

What age are they. Are you teaching them in a group?

Why do we have three threads about this same topic, two with identical post titles, all from members in Turkey?

Probably from the same class.