...When our children were toddlers, we were camping with a TT, so didn't have steps inside to worry about. By the time we got our MH (last year), our kids were well past the toddler stage, so inside steps are not really a concern.
Now, accidentally pushing the screen door open and falling out and down the steps outside...THAT is a major concern we had when our kids were toddlers, and still do somewhat today even though they're bigger.
Easy solution to that, though, that we've done with all our RVs: Install a 'hook and eye' latch to screen door, right above the slider. Can easily latch or unlatch it from inside or outside, is high enough a toddler can't reach it, yet makes sure screen door will not swing open when you don't want it to. I highly, highly recommend this modification for anyone that camps with smaller children. I actually just helped my BIL install one of these on his 5th wheel, as his children are a bit younger than ours.