NASA is helping children all over the country who are out of school and stuck inside. They have posted tutorials on STEM activities that your children can do at home. They can build a habitat for the moon, an edible spacecraft, puzzles , or rockets that you can build in your own backyard. These can all be done with items that you already have on hand such as: tape, paper clips, and straws.
Be sure to visit their website at: https://www.nasa.gov/stem-at-home-for-students-k-4.html