Once the child has mastered the Pink Tower (read a post here) and Brown Stairs (read a post here) separately, you would start introducing extensions of these activities, by combining the two. (Buy the Pink Tower here and Brown Stairs here.)

Adrian at 27 months working on Pink Tower & Brown Stairs Extension:

Building Pink Tower & Brown Stairs vertically.

A material incorporating "control of error" allows a child to check his own work and self-correct if needed.

Adrian runs his index finger across Pink Tower's cube and a Brown Stair to see if they are the same height.

Building Pink Tower & Brown Stairs horizontally.
The Pink Tower & Brown Stairs when laid correctly would align in height.

Building Pink Tower & Brown Stairs horizontally on an angle.

Adrian at 33 months, working with Julia, 6 and-a-half:

Here, Julia is improvising, making her own design.

Not that long ago, Adrian attempted this particular combination, and he could not do it.
At 36 months, he is confident and precise.

Adrian at 42 months assembled this extension to honor the ๐ Earth Day.

Children's engineering skills have led to this extension!

I โค๏ธ๏ธlove how certain traditional Montessori Sensorial materials have math intertwined in them, exposing children to early algebra and geometry. It is such a joy seeing my ๐ฆ๐ผ๐ง๐ปchildren work together on Pink Tower & Brown Stair extensions, while also developing their engineering skills.

Pink Tower consists of 10 pink wooden cubes with width graduated in increments from 1 cm (which is 3/8" on each side) to 10 cm or 1 cubic centimeter to 1 cubic decimeter. Any 2 successive cubes vary in 3 dimensions: length, width and height, thus making their difference in size reasonably obvious to a child. Pink Tower is a material for teaching size, where cubes increase progressively in the algebraic series of the third power according to the numerical series.

Brown Stair however is for teaching thickness. While the length of the stairs (prisms) remains constant, the square section of the broad stair varies: sides of the square sections vary according to the series of natural numbers, i.e., in the 1st stair, the square of the section has sides of 1 cm, in the 2nd of 2 cm, in the 3rd of 3 cm, etc.. The stairs therefore are in the same proportion to one another as the numbers of the series of squares (1, 4, 9, etc.), for it would take 4 stairs of the 1st size to make the 2nd, 9 to make the 3rd, etc. The pieces which make up the series for teaching thickness are therefore in the following proportion: 1 : 4 : 9 : 16 : 25 : 36 : 49 : 64 : 81 : 100..

Wow ๐ณ that is a lot for playing with cubes and prisms!

What extensions do you do with your child?

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• May 23, 2017 at 12:23 am

Hello where did you purchase the pink tower and road stair? Thank you.

• May 23, 2017 at 2:36 pm

Thank you for your interest. I have the links to both product at the end of 1st paragraph (see above), though you might find different pricing as the quality does range. Or, check my Amazon Store link here http://astore.amazon.com/montessorifromtheheart1-20?_encoding=UTF8&node=60

• June 28, 2017 at 6:45 am

Where did you get the extension cards from?

• June 28, 2017 at 10:50 am

Please, subscribe to my blog, and I will receive a notification of your subscription with your email. I will then email them to you. Which exact extension would you like? There are few levels of difficulty. Thanks, Anya

• August 21, 2017 at 11:54 am

Hi, your extension cards are great, can you tell me where you got them as I am looking for a set for my classroom. Thanks, Simon

• August 27, 2017 at 2:11 am

i’d also like to ask for the extension cards. thank you so much

• August 27, 2017 at 11:24 am

I emailed them to you, Anya

• October 20, 2017 at 2:53 pm

Hi, these extension cards are fab. Would I be able to have a copy?

• October 31, 2017 at 1:49 am

Hi, I’ve just subscribed to your blog, as it is an very inspiring. I would like also to receive the extensions for Pink tower, and for the Pink tower with the Brown Stairs, please. Many, many thanks!
Claudia

• November 19, 2017 at 4:45 am

Hi, we’re just starting to work on brown stairs and pink tower.
Could you please send me the extension card? Thank you so much

• January 23, 2018 at 9:14 am

Hi. I have subscribe to your blog. Could you share your pink tower and brown stair extension cards ? thank yo so much

• January 25, 2018 at 1:03 am

Of course, I will email you ๐

• May 5, 2018 at 5:35 pm

Hello!
I’m just having so much fun browsing through your blog. Would you please email me those pink tower and brown stairs cards you are using? Thank you so much! =)

• May 9, 2018 at 11:32 pm

Thank you, I emailed you the cards, Enjoy!

• May 9, 2018 at 11:33 pm

Not sure if I emailed already, but I emailed all 3 sets just now again ๐

• May 9, 2018 at 11:39 pm

Did you ever received the cards? If not, just email me your email again ๐

• May 9, 2018 at 11:40 pm

• May 9, 2018 at 11:41 pm

Did you ever got the cards? If not, let me know your email ๐

• May 9, 2018 at 11:41 pm

Did you ever get the cards?

• May 9, 2018 at 11:42 pm

Did you get the cards?

• May 20, 2018 at 6:33 am

Could I have a copy of the extension cards please

• August 8, 2018 at 7:37 am

Hello Anaya,
I am from Germany and have come to your sinde. Recently i brought the pink Tower and the brown stairs dir my Children. Your Extension Cards are Fantastic. Could you provide these to me? Thank you very much, Marie

• August 10, 2018 at 8:23 am

Wonderful! I just emailed them to you! Enjoy!

• October 3, 2018 at 4:04 pm

Hi Anya,
I run a small homeschool in Canada and I have just started to introduce pink tower and cross stairs and would love your extension cards. I have already signed up for your blog…
Thank you much
Sam

• October 4, 2018 at 7:53 pm

Of course! Just emailed! Xoxo

• January 10, 2019 at 1:50 pm

Very helpful blog. Thanks in advance for all the information. Would be obliged to receive the extension card sets that you used for my little daughter. My email Id is er.priya.k@gmail.com

• August 19, 2019 at 1:02 pm

thanks a lot!!!!!!!!!!

• August 19, 2019 at 4:57 pm

Did you find the pdf?

• August 19, 2019 at 4:57 pm

Did you find the PDF? Let me know if you did!

• August 29, 2019 at 5:56 pm

i am sorry but i mot received the cards in pdf

• October 19, 2019 at 10:46 pm

Hi there. Thank you for your detailed explanations. Much appreciated. Would it be possible to get a copy of your extension cards. I can’t wait to show these to my little ones.

• December 6, 2019 at 1:23 am

Hi, Anya

I was just looking for the difference of pink tower and brown stairs to decide whether I should buy brown stair or not, since I already bought pink tower. But reading your blog, I cannot wait to have them both for my child! Lol

• December 6, 2019 at 1:29 am

Hi, Anya

Actually I was just looking for the difference of pink tower and brown stairs to decide whether I need to buy brown stairs or not, since I already bought pink tower. But reading the extension of it in your blog, woww I cannot wait to have them both for my child! Lol

Anyway, can you also email me the cards for the extension? I would really appreciate it.
Thank you very much.

Keep inspiring ๐

• March 17, 2020 at 3:22 am

Hi Anya,
I just purchased my brown stairs and am so excited to get started working with them together with the pink tower. Your blog is inspiring.
Please send me the extension cards if you would be so kind.

Thank you!

• March 31, 2020 at 11:33 am

So glad! Thank you! Sending them now

• March 31, 2020 at 11:40 am

sorry your email came back as undeliverable

• December 4, 2020 at 10:49 am

I’d also love the extensions! i tried to find them in shop?

• January 4, 2021 at 8:36 am

I also subscribed and would love the extensions. Your blog is a wonderful resource! Thank you so much!

• March 20, 2021 at 2:11 am

Hi Anya

We’ve justing working with pink tower and brown stairs.
Could you please send me the extension cards?
Thank you so much!

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