Don't feel bad, it isn't easy! Play dough is always fun. Watching a favorite tv show. Building with duplo together. Drawing or scribbling. Playing with a doll house or toy kitchen. Tickling or singing. Making cupcakes or biscuits they can help with. Doing some cleaning, they liked to follow me around with the vacuum cleaner. A drive in the car to get out of the house. A bath/shower together. I hope something here gave you an idea. Though when they are sick and grumpy, nothing much seems to work here either!