If you had two sets of twins - about 3.5 yr olds and 20 month olds... This is what your front steps might look like. I imagine there would be lots of picnic dinners outside, sprinklers and the occasional separation time to keep the peace. Fortunately we just have friends that are the same ages and this is only a hypothetical scenario.
I have already gotten, why couldn't they do this on the driveway... Which was entirely too hot at 4:30 : )