What is Coin Pay?
Coin Pay is a checkout-play game that helps children learn to recognize coins and count money, and it runs entirely in your browser. Each round announces a target amount out loud and in text, such as "100 yen." Your child then drags Japanese yen coins — 1, 5, 10, 50, 100, and 500 — onto the checkout tray until the total matches the price. Paying the exact amount earns a cheerful chime and confetti, while paying too much or too little brings a gentle spoken hint so kids can adjust. Three difficulty levels change which coins appear and how many are needed, so it grows with the learner from first coins to bigger sums.
How to play
- Choose a difficulty: Easy, Normal, or Hard.
- Press Start. A target amount is announced by voice and shown as large text.
- Drag coins from the palette at the bottom up onto the checkout tray. You can also just tap a coin to add it.
- Watch the running total update as you add coins. Tap a coin already on the tray to remove it.
- When the total matches the price, press "Pay this."
- If it's exactly right, you get a chime, confetti, and your streak goes up; a new question then appears.
- If it's too much or too little, you'll hear a hint — adjust the coins and try again.
- Tap the speaker icon anytime to hear the amount again. Turn voice off with the button if you prefer text only.
Great for
First lessons about coins
On Easy, kids meet a few round amounts and learn to tell coins apart by color and number at their own pace.
Practicing making an amount
Combining coins to hit an exact total is early addition practice disguised as shopping play.
Pretend shopping at home
Announce the price, let your child 'pay,' and turn everyday play into a natural money lesson.
Listening practice
The spoken amount trains kids to connect the number they hear with the coins they choose.
Building up to bigger sums
Move from Easy to Hard to work with all six coins and larger totals as confidence grows.
A quick, screen-friendly activity
Short rounds and simple drag-and-drop make it easy to play for a few minutes on a phone or tablet.
Privacy
Coin Pay runs entirely in your browser. It makes no external network requests, uploads nothing, and uses no sound files — the voice comes from your device's built-in speech synthesis and the chimes are generated on the fly with the Web Audio API. Only the best streak per difficulty is stored, and only in your device's localStorage.
FAQ
- Q. Is it free to use?
- A. Yes, it is completely free with no sign-up required, and there are no usage limits.
- Q. Which coins are used?
- A. Japanese yen coins: 1, 5, 10, 50, 100, and 500. Easy uses only 1 / 5 / 10; Normal uses 1 / 5 / 10 / 100 (no 50 or 500); Hard uses all six.
- Q. Do I need speakers or a microphone?
- A. No microphone is ever used. The amount is spoken through your device's built-in text-to-speech if available, but it is always shown as text too, so sound is optional. You can turn voice off.
- Q. My device doesn't speak the amount. Why?
- A. Some browsers or devices lack a built-in voice for the language, or need a first tap before audio plays. The amount is always displayed as text, so you can play without sound.
- Q. How do I remove a coin I placed by mistake?
- A. Tap the coin on the checkout tray to remove it, or use 'Clear tray' to start the payment over.
- Q. What is the streak?
- A. It counts how many amounts you pay correctly in a row. A wrong payment resets it to zero. Your best streak is saved for each difficulty.
- Q. Can my child play on a tablet or phone?
- A. Yes. The coins use touch-friendly drag-and-drop (and tap-to-add), so it works smoothly on phones, tablets, and PCs.
- Q. Is my data saved anywhere online?
- A. No. Everything runs locally in your browser, and only the best streak is stored on your own device.