Thank you all. I'll post back in the next week with more questions, photos. I'm discovered waiting isn't always a bad thing, in regard to brooms and mops. It allowed time for ideas to percolate. Stoves,sinks,refrigerator are not included.

Well, I'm no expert but I have been looking around. I think just about every sink (except bar and island sinks) you can buy is designed to go into a 24" deep cabinet. I think an average measurement is going to be around 17" for depth, at least that's what I found searching for a sink to go into a 33" base. For undermount you need about 1.24" around for the clips, so you're looking, maybe, at a 20x18 sink. That's overall exterior size, not bowl size. There are MANY variations on every size so have fun searching!

I would put a real window in your closet. The wall looks blank without it. And I would Commission a beautiful iron trellis for the spot where you have the Faux window to balance out the window on the other side. Train a vine, or even espalier a tree to grow upon it. Use landscaping to balance your design. Or, reconfigure your stairs to accommodate a real window. Good luck!

Congratulations. It looks like a wonderful home to raise your family. The most important thing is that they are playing happily and safely where you can easily interact with them and supervise them. This is their home and they are doing the important and wonderful work of play. So for these ages the basement does not work. A 2 year old (and even the 4 year old) need to be on the same floor level as the supervising adult, and your main floor room is ideal for that purpose. I would not close off the room too much. Maybe a curtain across the opening is all that you need. You need to hear what's going on. Or sometimes an unnatural silence is a clue that you need to pop your head in to investigate! Paint one wall with blackboard paint - it comes in many colours! There are lots of ideas on the internet for organizing smaller items (Duplo, books, puppets, stuffed animals/dolls, pretend hats/clothes). My granddaughters (ages 2 and 6) are often here and I have their things in heavy canvas bags with handles, the kind that you'd put beach stuff in. Some bags go in open cubbies and some into an armoire. It's easy to dump the bag somewhere to play, and then remind the children that one bags gets filled up and put away before a different bag gets dumped. https://mnmomma.com/ikea-toy-storage-hacks/ I love this idea! https://www.amazon.ca/Large-Children-Football-Organizer-Storage/dp/B01JLVC7NG/ref=dp_prsubs_1?pd_rd_i=B01JLVC7NG&psc=1 Or this one https://www.walmart.ca/en/ip/Toy-Storage-Organizer-Play-Mat-Outdoor-Basket-Large-Drawstring-Portable-Container-Bins-Floor-Activity-Kids-Room-Classroom-Gray/33XMDXW9HR61 I've seen deep old TV armoires repurposed very attractively as children's play places with lots of storage. https://thethriftycouple.com/5-ideas-to-repurpose-furniture-into-creative-play-for-kids/  Things like riding cars etc are more in-your-face but no less important for a child's development. This solution would work indoors too - a table with a curtain as the garage door. https://ourhousenowahome.com/2016/07/hide-kids-outdoor-toys-diy-storage-solution.html Enjoy that toys are part of your life now and don't stress that your house doesn't look like a sterile furniture store advertisement. If I walked into your house and the first thing I saw was your children's play area I'd think "Wow, what a wonderful family to grow up in!"