Nice work. I like the simple, unobtrusive and ad-free interface. I have kids who could use this although you face lots of competition for their very limited allotted active screen time [1]. The 6 yo gets 45 mins a week on the computer, usually opting for PBSkids, Kodable or Scratch. The 3 yo gets 15 mins usually opting for guided digital canvas painting as she learns to use a mouse.

There are a few good no-screen puzzle books for kids (lookup the ones by Usborne).

As a recent publisher of an interactive children's book [2], I am seeing more sales of the physical books than the digital/web editions despite the latter having more features including an element of teaching math.

Curious if you considered publishing a physical book with these concepts/math puzzles?

[1] This app inspires me to upgrade some of their passive screen time (TV) to more of your and similar apps

[2] https://tendollaradventure.com

Prime Hunter sometimes generates sets with no prime numbers.

I have a new suggestion. A guess the number game 1-100 in 7 tries or less. It doesn’t sound smart at first because its just guessing. However, if you always guess in the middle of the upper and lower bound, then you eliminate 50% of the possibilities. It's a pretty neat trick to get kids to think about how to approach a problem that seems random in a structured way.

This is great. I've been working on a social site where the content users post and scroll through are microgames (<500kb). My kids are my biggest users so far. My daughter loves this pill sorting game, for example:

https://xelly.games/game/b7eba4db-dc4b-4cfe-8420-3e42e494e52...

it's really nice (both idea/purpose and execution). what would be really great is having direct URLs for each game so you can share and point your kid to specific puzzle.

I did something similar for my children – very suitable for ages 3 to 5: https://store.steampowered.com/app/3355240/Teach_Kids_Games/

This is really great, well done! I have two young kids and was thinking about putting something like this together and I'm delighted that you beat me to it. Having a 6yo and 8yo, it would be great if there were some more basic games as well.

the 2nd game, click the prime numbers, my second board had only a 1 as a potential candidate, and 1 is not considered prime. the other numbers were all composites and I was awarded a big fat zero for knowing all this. (I went back in and the game does not allow clicking the 1, good; but the description "divisible only by 1 and themselves" doesn't really rule it out. maybe don't give 1's or explain this)

clicking the prime numbers is a bit hard to do, and they scooch out of the viewing area and disappear for a bit. not complaining but while i was figuring out the game on my first board, I did terribly because of that.

given the level of math proficiency required for the prime number game, I was shocked in the next math grid game when using the ascend/descend buttons it simply told me every time I had hit the right answer. thought this was how to play so I didn't try typing numbers in. on my firefox browswer the answer numbers are too big to fit in the cells.

That "odd one out" game is broken - it just generated 21, 14, 35, 49 and told me the right answer was "14" because it's the only number not divisible by 7. Also the prime number game generated a set of all composite numbers.

FYI Firefox fails to load the page for me:

> Secure Connection Failed > > An error occurred during a connection to quizmathgenius.com. Cannot communicate securely with peer: no common encryption algorithm(s). > > Error code: SSL_ERROR_NO_CYPHER_OVERLAP

We used to play with gcompris. It has similar puzzles for many different topics like numbers, constraints, logic gates and attention. Lately I found out that it has an android port on f-droid.

Have to ask: How old are your kids? Very fun puzzles! Do they like them?

It's cute! Well done. I enjoyed playing them.

The Math Grid game can be "solved" by just clicking the increment/decrement buttons until the outline of the box turns green.

I found that when no more prime number, the game still on. When I clicked non prime number game over and showed my score.

I was trying the sum game, but there was no combination of three numbers to add up to 15. I took a screenshot if it helps.

I'll just pop in to say it's neat that you built that for your kids. The presentation is good, too.

This reminds me of the Optiver internship selection process.

nice work! But these arent that easy! What age group target was this for?

neat!