ReadWorks.org is a great, free website that has grade-level stories/articles and comprehension questions. The stories can be read to your child on the computer.
There are videos of people reading TONS of stories on YouTube. Watch a video together, and talk about the story. Who are the characters, what was the problem, and what did they do? Have your child retell the story to you in complete sentences.
Crafts are a great way to practice language skills! You can give your child directions and see how well they follow along. After they finish the craft, have them describe it to you. https://www.dltk-teach.com/ has lots of springtime crafts to cut out and complete, including mini-books you can color and read together.
Other craft sites:
https://www.easypeasyandfun.com/crafts-for-kids/
https://www.parents.com/fun/arts-crafts/kid/
https://www.speechandlanguagekids.com/speech-language-crafts/
Scholastic Learn at Home is a great, free tool that has at-home lessons. Each lesson has a free book, video, and activity.
https://www.storyplace.org is a website with online games, and several online stories/crafts that go together.
Watch short videos together, and ask your child questions about what happened. I like the "Simon's Cat" videos on YouTube, which are linked above. There are also lots of free videos on http://kidsloveshortfilms.com/
Here are some links to websites with language practice games, as well as suggested practice activities, online: