publisher
category
price
Freestore
Reviews
4.5 (126)
United States
Description
Try a new kind of math game in line with the Math Revolution envisioned by innovators like Youcubed and AOPS. Designed especially for children 6-11, "21 Marbles" doesn't quiz or time the player, instead it let's them enjoy thinking and reasoning. A puzzle game's level progression is a natural "low floor, high ceiling" exercise. In the case of 21 Marbles, while the puzzles can become challenging enough to be enjoyed even by adults, the game has a friendly progression of difficulty that keeps everyone on board. For the youngest players, it has the additional benefit of practicing the most basic arithmetic facts in an instinctive way. For the adults, it's like a relaxing peg solitaire game. There are no instructions because the rules are natural and intuitive. 21 marbles - of colors and designs for all tastes - are won one by one. In every level, the recovered marbles - each representing the number 10 - break randomly into pairs of smaller marbles: either into a 9 and a 1, or an 8 and a 2, or a 7 and a 3, or a 6 and a 4, or two 5s. The marbles get positioned randomly on a board, and can be merged back together into 10s, by knocking together pairs that sum to 10. It is always possible to recover all 10s, but some thinking ahead is required. The "undo" button is always there to let you trace back your steps and find your mistakes. Learning to think ahead is not optional, and is the most important educational aspect of this game.
Category Ranking
Review Breakdown
Screenshots
Reviews
Hmmmm…
I loved playing this game…it really worked my brain.I was playing this game on a car ride and by the end of the car ride I had already done all 21 levels of the game and was so sad because it was so fun.I wish there were more levels!!!!
Princess EvySat, Jan 29, 2022
United States
Educational and fun
A great way to learn while having fun. Child-friendly, no ads.
specialappsskMon, Sep 16, 2019
United States
21 Marbles
Addicting! As you progress, the game gets more tricky and challenging.
PunnyGuyNYCMon, Apr 22, 2019
United States
잘했네요.
무료로 풀려서 잘했네요.
유료어플구매Sun, Feb 24, 2019
United States
Cute, but
Should have more levels
HobywonyMon, Jan 21, 2019
United States
Disappointed
You should be able to play more than twenty one levels.
SoxShadowMon, Jan 21, 2019
United States
Shucks. Does it really stop at 21?
It was just getting good! Of course game seems designed for kids, and as an adult, I have an advantage. The challenge level improves as the numbers get higher.
murrayphdSun, Sep 23, 2018
United States
Download & Revenue
About
Bundle Id
com.BalconiaMath.21MarblesMin Os. Version
8.0Release Date
Wed, Mar 21, 2018Update Date
Fri, Jul 6, 2018Content Rating
Has IMessage
NoSupport Watch
NoSupport Siri
NoFile Size
49.18MBHas Game Center
NoFamily Sharing
NoSupport Passbook
NoSupported Languages
Basque, Bulgarian, Catalan, Czech, Dutch, English, Finnish, French, German, Hebrew, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Nynorsk, Polish, Portuguese, Russian, Serbian, Chinese, Slovenian, Spanish, Swedish, Chinese, UkranianWhat's New
version
2.0.1updated
5 years agoSharing your progress with friends is now a click away. Actually, a click and a parental gate away, to be exact.
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