At night the girls get really silly and chase each other around the house. It often turns into a sort of wrestling match. Typically Madylin tackles Morgan to the floor and they both giggle until Madylin lets Morgan get up and then tackles her again. Madylin will even grab Morgan's waist from behind and then pull her down on top of herself.
Russell and I find it quite entertaining. We just have to make sure they don't hurt each other!