New favorite place

Recently N2 have discovered that they can get onto the roof of their play house.  That has become their favorite place to go when they are outside.  It scares me a little but what can I do?

Don't you love Noah's outfit?  I think those camo shorts are his favorite ones and that Toy Story dinosaur shirt is also a favorite.  He thinks Buzz Lightyear is on his shirt and I'm sorry to say he is not.  But I haven't told Noah that.  Here are N2 practicing roaring.  I'm not sure why they decided to roar but they wanted pictures of them roaring on top of the house.