The Investigate Box - Letterbox Lab

The Investigate Box Series

Time to up your science game!

This is the ultimate series of science kits for eager experimenters, curious tinkers and kid boffins alike. Developed with you – yes you! – in mind, this series of fun-packed science kits brings you absolutely everything you need to take your little scientists on an incredible adventure of wonder, curiosity and awe.

Each box contains:

  • everything you need (but still fits through most letterboxes),
  • enough materials for 1-3 children,
  • 6-8 exciting science experiments,
  • collectible lab equipment and gadgets,
  • a “level up” badge for your little scientist to wear,
  • a fully-illustrated 24-page instruction booklet,
  • link to online resources including video instructions and a scientific recipe.

Suitable for children aged 8 and up.

£24.00 per box inc. UK postage
£22.50 per box inc. UK postage
No recurring payments

*Both subscription options allow you to cancel or postpone payments at any point and choose to receive a new exciting science kit every month or every two months.

Not convinced yet? We’d tell you more about how super duper awesome our Investigate Boxes are, but we’d rather let our customers do the talking:

“Letterbox Lab is truly exceptional – my son absolutely loves it. We homeschool, and this is the best educational subscription box I’ve found. The experiments are so much fun, and there’s a definite progression through each month’s theme as you follow the experiments. This is a box that takes science education seriously and doesn’t condescend to, or underestimate children’s ability to understand scientific principles. My son has learned so much from Letterbox Lab – I couldn’t be happier!”

– Jo, mum of an Investigator

a girl making a liquid rainbow with letterbox lab science equipment
a boy doing a science trick with a test tube from letterbox lab
Letterbox Lab supplies series of science kits that gradually build skill and knowledge over time.

About the Investigate Box

What’s so good about it?

The Investigate Box is more than a science kit. It’s a science club that comes to you, sliding through your letterbox with everything you need to spend hours discovering the Universe with your little scientist. It’s the only science subscription box specifically designed to be a series. Each box follows the one before, so you know there’s always more to discover and the lab equipment you collect will be put to great use in your experiments.

How do subscriptions work?

Choose a pay-per-box subscription to set up monthly or bi-monthly payments. We send you a box each time you renew.  Choose a pay-per-3-boxes subscription to pay upfront for three boxes. These subscriptions automatically renew once all three boxes have shipped.

All orders are shipped within 3 working days  by Royal Mail 48, so you’ll get each box within five working days of payment.

We know that family life is busy and ever-changing, so our subscriptions are completely flexible. You can choose monthly or bi-monthly deliveries (or switch between them) and you can pause or cancel your subscription at any time. If you want to gift a set number of kits you can choose a pre-pay subscription.

What’s in the boxes?

Each box contains everything you need to perform 6-8 experiments, with most consumables being doubled up so you can do them twice (2 or 3 children can easily share a box), plus collectable lab equipment, a 24-page fully illustrated instruction booklet, pencil and badge.

We don’t like to be formulaic, so every box is different. You can see a full list of the boxes with the experiments inside here.

Playing with science can be as fun for you as it is for your little scientist if you get Letterbox Lab to do the work for you.

Have a look at what our customers have to say!

“I’m really really impressed. Literally everything is in the box, the gloves are child size, each experiment is in its own cute bag and the instructions are super clear and easy to follow with scope for kids to try their own ideas out and note down findings.” 

– Vicky

“Was really impressed with the way everything is set out, each experiment in separate labelled bags, making it very easy to find what you need. Knowing you don’t have a dash to the supermarket to buy extra ingredients is fantastic too.” 

– Sarah
Marvellous Mixtures Investigate Box
Vicky shared this fabulous photo of her little scientist concentrating on Incredible Inks from Investigate Box 1
Vicky shared this fabulous photo of her little scientist concentrating on Incredible Inks from Investigate Box 1

“Letterbox Lab is a fantastic educational product. I Home educate my 10 yr old son and we receive a new investigate box every month. Everything you need is supplied in the box, so no need to rush out and buy extra ingredients. Both myself and my son look forward to our science sessions every week, in fact it’s the highlight of our week. Always arrives on time and it does what it says on the box ‘fits straight through your letterbox’ so no need to worry if we aren’t in on delivery day. This really is the best educational product I have bought my son. Thank you Letterbox Lab.” 

– Tracey

“This is an excellent science kit and my 7 year old son absolutely loves it! It makes science so much fun as it is learning by doing, not just looking at 2D worksheets. As a parent it is easy to be confident when everything is in the box ready to go and there are easy child friendly explanations for all the experiments. Would highly recommend!”  

– Morgan
£24.00 per box inc. UK postage
£22.50 per box inc. UK postage
No recurring payments

*Both subscription options allow you to cancel or postpone payments at any point and choose to receive a new exciting science kit every month or every two months.