My nephew - guidelines?

Since he's still a wee little chap, I'm not interested in anything past Jupiter. I'll deal with all that in 20 years. He loves the outdoors and enjoys exploring & seeing what's beyond his immediate surroundings. He's afraid of heights and latches onto me any way he can like a baby sloth when I lift him for a long "flight" around the place lol. He doesn't smile often, but he's a good-natured kid and just observes everything and everyone with those large green eyes of his. Smirks a lot.

I'm a bit concerned about his Leo moon. Considering that pretty much every Leo moon around here is (more or less) the worst DXP has to offer, doesn't quite fill me with hope for his adulthood past 20.

On a more serious note, the kid doesn't doesn't spend as much time with his father as he does with his mother (my sister). He works long hours and she works from home. I'm not happy with her parenting skills. A Cap sun/Pisces moon, she's very stern and I've always described her as an ice queen. She gets irritated easily and doesn't seem to encourage her kids' natural curiosity.

One time she snapped at her then-8 yo daughter to be quiet when she kept asking questions about a robotic prop a band were using during their concert. Later I took her aside and answered all her questions. I've seen her react in a similar way towards my nephew now. She'd be going through the bottom cupboards in the kitchen, the little one would be checking out the completely harmless objects and she would repeatedly swat him away like he's some pestersome cat.

Another time she got really mad at him because he wanted to step outside for a bit one evening, because it was an overcast day and it would start raining soon. I put a hooded jacket on him and took him out the back. He seemed to be fascinated with some colorful lights the neighbors had hung around their tree so I just lifted him up, he gripped the top of the fence with his tiny hands and just stared at what's beyond for a few minutes. She came after us nagging about a few droplets of rain dropping on his hood.

I'm worried that her stifling manner will hinder his learning spirit. Her daughter, my niece, now in her mid teens, grew into a complacent & lazy girl who hates school (Taurus sun, Libra moon, Sag rising) - whereas she used to be a fireball when she was a toddler to around 6. I've said it before and I'll say it again: some people don't deserve to be parents.