It's been pretty easy babysitting these boys at this stage of their lives. Zane is an independent player for the most part, and doesn't make messes and get into things he shouldn't just for the fun of it.
Barry is immobile.
That's the important part.
I'm not looking forward to the time when Barry starts to crawl. The biggest reason is that the easy part of taking care of these boys will be over. Barry will want to crawl on the tracks where Zane will want to be driving and grabbing the engines Zane will want to use.
But, until then, I will enjoy this time. Perhaps it won't be as hard as I think. After all, it's so sweet to see Zane showing Barry his trains. They will be able to share and play together.
At least for a long time yet.