Invent JNR Cardboard

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Regular price $78.99 Save Liquid error (snippets/product-form line 69): Computation results in '-Infinity'%
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  • Cardboard is a readily available, free and unlimited building block that can be folded, sawed and hole-punched while maintaining its durability. Better still, it can be reused and recycled.
  • Breathe life into traditional curriculum and lesson plans! It facilitates active and intentional teaching while catering to differentiated learning. Perfect for individual work and group projects.
  • With the pride of independent making, it open the door to imaginative play where the child is protagonist in a hack-able world of their own making.


It's an easy to use system of specially designed and reusable kids tools that offer limitless opportunities for creative construction with upcycled cardboard. Encouraging creative thinking, problem solving and imagination, the open ended kids tool kit system teaches children not what to think, but how to think. This 366 piece tool kit for kids includes:

  • 12 x SAFE-SAW JNR. – flexible plastic blade to saw cardboard, not fingers
  • 12 x SCRU-DRIVER – connect cardboard as simply as righty tighty, lefty loosey
  • 240 x SCRU – connects up to 3 layers of corrugated cardboard
  • 90 x SCRU XL – connects up to 6 layers of corrugated cardboard
  • 12 x MINI-TOOL – for parallel and cooperative making
  • + TOOLBOX – packaging opens into a handy sort and store small tool box


  • Package Dimensions 13.07 x 9.53 x 3.7 inches
  • Item Weight 2.74 pounds
  • Manufacturer recommended age 4 years and up

Our SmartKidsPlanet initiative began in 2017 when 3 geeky and dedicated parents saw a gap in the children’s toys and games market. An opportunity was spotted while we struggled to find toys and games for our kids which enriched their minds and guided them toward science, art, math and construction. The trio then knew that their paths were set, establishing an online shop with a comprehensive range of intelligent toys for babies, children and young teenagers.

With offices based in California, our SmartKidsPlanet team enjoys a daily growth in our presence within the children’s educational toys market. We love our new place in life, and we love helping young minds with their growth and skill development, all while having as much fun as possible.


We ship all our products directly to you from our warehouses located in multiple locations in the West and East Coasts.

Processing Time: All orders placed after 2 PM EST will be shipped the next business day. Orders placed after 2 PM EST Friday will be shipped on Monday. 

Orders are shipped and generally arrive within 2 to 3 business days after the order is processed. Tracking information will be sent via email once your order has been processed. The tracking number may not become active for 24 - 48 hrs.

Kindly take note that due to our business utilizing multiple warehouses within the United States, orders of more than one item may arrive as separate deliveries at different times. 

Orders made to PO BOX may take up to 12 days. Additionally, we do not ship to military bases. Hawaii and Alaska

Customer Reviews

Based on 6 reviews
Miller Mendez
A top and scalable activity

I love doing manual activities with my children and I did not know this type of box at all. My 8 year old daughter really liked the activity. She loved having her own tools like a grown-up and being able to make something like daddy.
I love the idea of __reusing cardboard boxes to give them a second life. No need to pay extra for buying materials, this is the best. The cardboard toolbox for storing the screws is very well made.
The only thing that I find unfortunate is that there is not a small booklet in French to give examples and ideas to children for getting started.
An activity to continue and redo endlessly, I love the concept. I'm going to buy some screws so my daughter can do bigger projects. A great concept that we love and recommend.

Bradley Porter
My guys are builders

The value for the money is great, very sturdy and so far durable. So yeah, these guys destroy much of everything and they have held up so far, we will see

Elliott Hunter
Amazing toy for kids and adults alike!!

I bought this toy for my grand nephew and not only he loved it, but I did too!!
You can use all sorts of cardboard and cereal boxes and make crazy things!!

Anthony Simpson
AWESOME STEM Toy for little builders!

Used this product for first time at a STEM playplace and was amazed! This is the best solution/tool for taking your kids cardboard creations to the next level!!! My 3 year old loves building stuff and playing make believe with cardboard boxes so this was a perfect gift for him. The saw is a bit tricky and takes some brute (grown up) strength to cut through the boxes. But the screwdriver is fairly easy for my 3 & 5 year old to use - with some practice, and an interest. I love that it came in minimal packaging including a tool box with a sleeve that can slide over it for storage. This is a perfect variety and quantity of tools and screws so multiple kids can play together. I can see my 3 year old growing into this toy even more as he develops his fine motor skills and strength. Wonderful for the imagination! I was impressed even with the helicopter we made.

Felix Silva
Awesome and green

I am very pleasantly surprised with this DIY kit.
It is of course safe (but you still have to supervise children) and allows you to make constructions with cardboard.
"Screws" of several lengths are provided, this allows to fix 1, 2 or 3 pieces of cardboard.
You can also buy screws to complete the set.
Very good gift idea which also allows to give a second life to the boxes before throwing them away!




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