A great activity that should keep your child engaged for an hour or 2 is building indoor dens. You don't need anything fancy. Some blankets or bedsheets usually work best. You will be surprised at home much initiative the children have when it comes to problem solving to build.
Something they might really LOVE is if you let them have a picnic in there!! Or if you have a child that sleeps well may I dare suggest they are allowed to sleep in their den?
Post any photos to your child's Class Dojo we would love to see them!