How Playing Games with My Daughter Led Me to Build Tangyuan Math

Most of my time with my daughter looks pretty ordinary.

We read books, build things with blocks, work on puzzles, and get some exercise. Sometimes we finish what we started. Sometimes our carefully constructed building falls over before it is finished. Sometimes a puzzle becomes an excuse to talk about something completely unrelated.

I enjoy all of it. But there is another activity my daughter especially likes: watching me play video games.

Two of her favorites to watch are Stardew Valley and Brotato. They are very different games, but both give us plenty to react to together. She watches what happens on the screen, follows my decisions, and gets excited when something goes well.

Naturally, watching eventually led to a question: could she play too?

That was where things became a little complicated.

When “Can I Play?” Became a Parenting Question

I understood why she wanted a turn. From her perspective, Dad was doing something fun, and she wanted to join in rather than remain a spectator.

But I had concerns.

I worried that she might find video games difficult to stop playing. I also worried about too much screen time and the strain of spending too long looking at a screen. So, for those games, my answer was no.

She was not happy about that.

Looking back, I can understand her disappointment. It is not especially convincing to tell a child that something is enjoyable enough for a parent to do, but not something they can try themselves.

At the same time, setting boundaries is part of being a parent. I did not want to ignore my concerns simply because saying yes would have been easier.

What I wanted was a different way for us to play together: something with the excitement of a game, but with short rounds, a clear stopping point, and a little more value than simply watching me play.

An Idea We Came Up With Together

Eventually, my daughter and I came up with an idea: what if we made a math game that the whole family could play?

Not a complicated game with a long tutorial. Not something that required everyone to learn a new set of rules.

Just multiplication.

The basic idea was easy to understand: answer a set of multiplication questions, try to get them right, and see how quickly you can finish.

That idea became Tangyuan Math.

I liked the simplicity immediately. Everyone in the family could understand what to do. We could take turns, compare results, and challenge ourselves without needing separate controllers or a long afternoon.

More importantly, my daughter was no longer just watching something I had chosen. We were making something that began with a problem we had encountered together.

Simple Rules Do Not Mean an Easy Game

Multiplication sounds straightforward—until you try to answer ten questions involving two-digit numbers in just a few dozen seconds.

Then it becomes surprisingly challenging.

Knowing how to calculate an answer is one thing. Doing it accurately, repeatedly, and under time pressure is another. You need practice before the numbers start to feel familiar and your calculations become smoother.

That is part of what makes the game interesting for me as an adult.

I am not simply supervising my daughter while she does an exercise. I have to concentrate too. A question that looks manageable can suddenly feel much harder when the clock is ticking.

And speed alone is not enough. Rushing into a wrong answer does not help.

There is a satisfying balance between staying calm and moving quickly. Sometimes the best improvement comes not from trying harder to be fast, but from finding a clearer way to calculate.

Practice First, Challenge When You Are Ready

Although our original idea was a family math competition, I did not want every session to feel like a race.

Tangyuan Math therefore includes an untimed practice mode. Players can choose a number range and work through five, ten, or twenty questions without a countdown.

For me, that matters. A timer can make a familiar skill exciting, but it can also make an unfamiliar one frustrating.

The challenge mode is there when players feel ready. It has ten levels, with ten questions per level and progressively shorter time limits: from 120 seconds at the beginning to just 20 seconds at the final level.

There is also a mistake review feature, so an incorrect answer can become something to revisit rather than simply a disappointing result.

The idea is not that faster always means better. It is that understanding comes first, and speed can become an optional challenge afterward.

A Few Rounds Have Become a Family Habit

These days, when we have a little free time, our family sometimes plays a few rounds.

It does not need much planning. We can take turns and see how we do. Some rounds go well; others remind us that we could use more practice.

The fun comes partly from the results, but also from doing the same thing together. Instead of one person playing while everyone else watches, each of us can have a turn.

I particularly like that adults are not automatically impressive just because we are adults. We still have to solve the questions. We still make mistakes.

That makes it feel more like a shared game and less like a parent assigning homework.

Of course, a math game is still a screen activity. I do not see it as a reason to forget about breaks or abandon the books, blocks, puzzles, and exercise we already enjoy. It is simply another option—one that fits naturally into a short stretch of family time.

Why I Consider It a Successful App

We have also recommended Tangyuan Math to relatives and friends.

Its appeal is not limited to children. Anyone comfortable with multiplication can try it, and the harder challenges give adults something to work toward too.

That broad accessibility is one of my favorite things about it. The rules are simple enough to explain quickly, while the challenge leaves room to improve.

When I think about whether an app is successful, I do not think only about how many people use it.

I also ask whether it solves a real problem, whether people return to it willingly, and whether it creates something worthwhile in everyday life.

By those measures, Tangyuan Math feels like one of the most successful apps I have made.

It started with a small disagreement between a father and his daughter. It became something we could build around a shared interest. Now it gives our family a reason to sit together, concentrate, laugh at our mistakes, and try again.

That is enough to make me proud of it.

If you would like to try a few rounds with your own family, Tangyuan Math is free to play, with no account required and no ads.

Start without the timer if you prefer. Take turns. Keep it light.

You might discover, as we did, that a few multiplication questions can become a surprisingly enjoyable way to spend time together.