1.+2. I excluded them because they are turn-based not real-time, but they are definitely great strategy games.

3. Hyrule Warriors works for small kids? Never would've thought that. But yeah, good game.

4. I definitely missed that one. I love DQ Builders. Not in the genre list, but might work for kids. Although the quests involve reading the text from the characters, so maybe not for a pre-school kid.

5. Yeah, Octopath is a great RPG. And people who are unsure can try the demo to get an impression.

Well, as I do for such question I point to the collective wisdom of VGC-users which for Switch recommends 61 titles: http://gamrconnect.vgchartz.com/post.php?id=8956012

For RPG I would say it is always worth to check out Octopath traveler, it has a demo in the eshop to gauge if it is your cup of tea. If you more into strategic classic western RPG, Switch also has Wasteland 2 and apparently gets Pillars of Eternity 2 and Pathfinder Kingmaker (all three are Baldur's Gate/classic Fallout style of games, where you control a party of characters in isometric view with pretty complex and deep roleplaying statistics system). For JRPGs Xenoblade Chronicles 2 and Ys VIII are clear recommendations for action style JRPGs with big story and exploration. And you also need to have Pokemon on the radar, which comes later this year. For an Etrian Odyssey style game you might wanna check out Labyrinth of Refrain: Coven of Dusk (what a mouthful). NIS generally has gone full into Switch support mode, they have released nearly everything in their catalog, so you might check out what they offer. Noteworthy surely also is Disgaea 5. Besides that I hear good things about Tales of Vesperia. And you have a lot of smaller RPGs, like Darkest Dungeon, Banner Saga or Battle Chasers Nightwar.

A listing of First Person Shooters on Switch can't go without Doom. With that out of the way, Switch isn't the strongest platform for FPS. You can get all the free to play stuff, and much of it is pretty good. This includes Fortnite, Paladins and Warframe. I would recommend to check them out, as you have nothing to pay to play at first and you can decide if you wanna dive deeper. It has got some support from smaller FPS though, that target old-school-type FPS like Immortal Redneck, Apocryph and Ion Maiden.

Real-time strategy on Switch (or console in general) is not something I am very aware of. I know Switch has Townsmen and Mushroom Wars. Seemingly some include MOBAs into this category, so here you are set with Arena of Valor and Smite.

Should a toddler play video games?

Well, I am not too sure about what qualifies as good games for small kids. I assume something you can play together and is easily accessible. I would say Super Mario Odyssey might qualify. You might also take a look at Katamari Damacy (has a demo), this might or might not be viable for a child. And Mario Kart probably works for all ages.

3.  Yeah my daughter used the motion control set-up and I used the Wii U gamepad.  She was pretty used to motion controls from Wii Sports, so she could handle Hyrule Warriors just fine as long as I was aware of the objectives.  All she had to do was beat stuff up.

I just checked and saw the OP's kid is a toddler though.  That is a tough age for video games.  The only thing my daughter could play that young was 2D Mario and maybe Wii Sports (though that came a bit later).  Even Mario Kart is too advanced for a toddler.  2D Mario is magic though.  It really is a game for everybody.



EDIT:  Actually with the guardrails setting on Switch's Mario Kart, I think a toddler could play it.  Also Valkyria Chronicles is turn based but it has a real time elements to it, so that is why I suggested it.