Our new Puzzle Box Challenges are a great way to revise Key Skills at the end of the year or to use during the year to revisit concepts that have been learnt previously. Answer the maths problems to discover the codes, then unlock the padlocks to open the box and collect your reward!
Click on the image above to open our FREE online puzzle box
Our FREE online Puzzle box can be set with the correct codes then displayed on a laptop, tablet or big screen for individual children, groups or even whole classes to see how quickly they can open the box.
Puzzle Box Challenge Cards
Our Challenge Cards are available to buy for school years 1 to 6 at a cost of only £5 per year group or £20 for all years! Each year group contains 10 sets of challenges (A to J) with each set consisting of 4 different challenge cards that each generate a 4-digit padlock code when answered correctly.
You can purchase your challenge cards below by selecting the year groups you would like to buy and then clicking on the purchase button. After payment has been completed, you will be taken to a confirmation page where you can download your files and you will also be sent the download links via an email from firstname.lastname@example.org (please check your junk mail if this email doesn't arrive).
In the interest of security, all payments are processed securely through Paypal (although a Paypal account is not required) so we never see or store your payment details.
Please be aware that as of 1st June 2021, we are now VAT registered. The prices listed below are exclusive of VAT (20%) which will be added at checkout although most schools will be able to reclaim this. A VAT invoice will be sent after ordering.
Number Stacks is a UK product and we are unable to accept orders from customers outside of the UK at the present time.
Purchase Your Challenge Cards Here: