# Numbers

2014-02-06

Here is a set of educational paper toys: Remember the papercraft alphabet? Ever since I published it, there have been requests to complement it with a set of numbers. I finally got around to designing the numbers.

These are not plain and simple numbers, either, but they come with a trick: Each number has a depth proportional to it’s numeric value. So two is twice as deep as one, three is 1.5 times as deep as two, and so on.

That means that it’s very easy to do math with these numbers, in particular subtractions and additions. It’s so easy, in fact, that my 3 year old son (who knows what the numbers look like, but can’t actually add or subtract) spontaneously started doing math with them. This is how it works:

Here is a video of my son adding 1 plus 3, and then more (in German, but I have added captions):

Here is the rest of the gang:

You will notice that each number has it’s own, distinct color. The colors follow a gradient, so that similar numbers have similar colors. Each number has the corresponding word printed on the front. This also helps to decide about the orientation of 6 and 9.

The ten is very useful for results greater than 9, as you can represent, say, 15, by putting 10 and 5 next to each other. And it has stripes corresponding to the individual numbers, which again helps to bring them into the correct sequence.

The numbers have a ‘blocky’ look. This is for two reasons: First, perfectly rounded numbers would not stand on their own. And second, they are much, much more difficult to build. Believe me, I’ve tried. In fact, I had a complete set of non-blocky numbers which was so finnicky to assemble that it just wasn’t worth it.

As for the holes in 6, 8, and 9, you can actually leave them in there, as it’s somewhat difficult to cut them out, but if you want to remove them, use a sharp Xacto knife and be careful.

If you make these from >150 gsm paper (53 – 82 lb bond/ledger), they will be quite sturdy.

I have made eight sets of templates: Ones with and without the names of the numbers on the front, colored and outlined, and with proportional depth and fixed depth:

The ones with fixed lengths are more for display purposes or to complement the alphabet (where each letter has the same length).

1. EstherCW,

The kids are making the 8 and the 0 for their grandfather’s birthday. Thanks, this is marvelous.

2. Ican,

Hi, thank you so much for the project. i used it as a gift for my fiance for our anniversary, and she’s loved it:D
Terima kasih from Indonesia :)

3. pionikko,

Again a wonderful project ! Thank you very much for sharing this, I will use these for my grandson when he is ready to learn numbers. I have already used the alphabeth as gift cards because they are so beautiful. Everyone likes it. Greetings from Antwerp, Belgium

Thanks for the feedback – nice to hear from Belgium, which I liked a lot the few times I had a chance to visit there!

4. Marta ABB,

Hi! What a cool project. I will recommend your numbers on my blog when I have a second :)
Best regards from Barna,
Marta

5. Jaime Lee,

I found your website thru Pinterest randomly. I was saving your pdf file of Alphabets to make for my 4yo son. I found your Number blocks while looking at your artwork. You are a genius!! It is amazing and so thoughtful. I am so glad that I found your website.

Greetings from Kuala Lumpur, Malaysia :)