Investigate Box Pre-pay Subscription


Would you like to get a box of exciting science fun every month without signing up to a subscription? Pre-pay here for as many boxes as you’d like without any further payments.

Price includes postage (UK). Additional charges apply to postage to Ireland.



Pay for months of science fun with a single, one-off payment.

This is a subscription without any recurring charges. Buy as many Investigate Boxes as you want in one go. The first box will be in the post to you within two working days and the rest of the boxes are sent out every month.

This option makes an excellent gift. If you’d like us to send the first box to you (so you have a present to hand someone) and all later boxes to a different address let us know.

The Investigate Box Series

5 to 8 experiments in each box, at least 4 hours of science fun.

A series of 12 different science kits that build upon each other with collectable lab equipment.

The boxes contains everything you need to do the experiments – no shopping list of extra stuff to buy.

Fits through most letterboxes – no trips to the post office.

Video instructions and illustrated instruction booklet.

Suitable for children aged 8 and up.

Sneak a peek inside Box 1 – Marvelous Mixtures, first in the Investigate Box series.


Investigate Box, science kit for children aged 8+

This kit is an introduction to science which looks at mixtures, from mixing chemicals to make jelly worms to exploring how light is a mixture of colours.

Experiment 1, Incredible Inks: make art with chromatography by splitting different inks up into the different colours they are made of.

Experiment 2, Rainbow Glasses: make your own pair of rainbow glasses that turn every point of light into multiple rainbows showing how white light is a mixture of all the colours of the rainbow.

Experiment 3, Rainbow Spinners: mix colours together with the rainbow spinner and see colours appear to come from nowhere

Experiment 4, Liquid Rainbow: build a rainbow out of liquids of different densities.

Experiment 5, Brilliant Breathless Balloon: inflate a balloon by mixing two chemicals together that react to make a gas.

Experiment 6, Squirmy Worms: mix two liquids together which react to make jelly worms.

Collectable equipment: laboratory goggles, scissors. Petri dish, rainbow glasses, spinning top and measuring cylinder. Includes all the equipment and chemical reagents to perform all the experiments.

There are 11 more boxes in the series from Box 2: Science up your Sleeve to Box 12: Go Forth and Science.


Sounds great, if I order now when will I get it?

Order today and your exciting new science kit will be in the post within two working days. Shipping to Ireland can take up to 15 working days.

How many different boxes are there?

The Explore Box is a series of 12 awesome science kits. Each comes with a beautiful, full-colour instruction booklet and a private members’ area with helpful video instructions, extra information on the experiments and ideas for extra experiments.

So, this is educational then?

Letterbox Lab was started by two people who just love playing with fun, surprising and interesting science stuff and want to share that with people. So, the first thing we ask about any activity we’re planning to put in the box is “Is it fun?”. But each kit does support the primary school curricula of all four regions of the UK as well as going beyond the curricula – science knows no borders or restraints.

One of the advantages to this being a series of science kits instead of one-offs is that we refer back to previous boxes so that your child’s knowledge and the content of the boxes grow together. 

Do I need to know a lot about science to help my kids play with this?

Not at all. Our whole thing is that we want to make playing with science as simple and as convenient as possible. Our instruction leaflets are fully illustrated and we have video instructions for each box to make doing the experiments hassle-free.

If your child asks a question about the science that you can’t answer please send it to us – we’d love to answer it for you. We’re not just selling you a product, you are joining our club and we’re here to support you. If your child’s question is so clever that we don’t know and/or can’t find the answer you can give them a big pat on the back! 

Is it safe?

Yes. In developing the Investigate box we’ve closely followed the regulations set out in EU 71-4 (Safety of Toys: Experimental sets for chemistry and related activities) so that even when we include reagents that you wouldn’t find on the shelves of your local supermarket, they are weighed out and packaged in such a way that they cannot harm your child. We supply safety goggles and gloves to handle these reagents too. All equipment that we put in the boxes is carefully vetted for safety. However, as with anything harm can come through misuse so we provide plenty of instructions on how to use our materials safely. 

Is it going to be messy?

Working with liquids always has the risk of spills so our clever boxes open up to work as a tray for performing the experiments in to contain any potential mess. We also provide disposable gloves to keep hands clean. The first page of each experiment has a “messiness rating” to give parents a heads-up.

What's the difference between the Explore and the Investigate Boxes?

Both Explore and Investigate are 12 month (no-commitment) subscriptions that put everything you need to play with science straight through your letterbox. There are a few things that distinguish the boxes:

  • The Explore box is for those who like to tinker or who don’t have a lot of time, containing 2-3 activities that will entertain your child for up to 1 hour.
  • The Investigate box is a bigger, more involved box containing between 6 and 9 activities that will engage your child for up to 3 hours. Generally you will find all of the activities from an Explore box in the corresponding Investigate box, but with additional activities that take your child’s discoveries further and require a more extensive collection of lab equipment (which, of course, is included).
  • The activities in an Explore box are usually loosely tied to a particular topic (although we don’t like to constrain learning with tight topics!), but the Investigate box takes children on a journey via a 24-page booklet featuring Meg and Pico, the Lab Assistants.
  • The Investigate box is an experimental set containing a range of chemical reagents, and as such is only available for children over 8 years. The activities in the Investigate box include scientific demonstrations, experiments and creative projects.
  • The activities we select for the Explore box are from the third category; these don’t require laboratory equipment or any chemical reagents other than common foodstuffs (e.g. salt, sugar, flour). So the Explore box is not an experimental set but a creative set based on scientific principles.

Where do you ship to?

We currently ship to the UK and Ireland

Return to Investigate Box Options


“Extremely good value for money…we found it easy to put time aside to do an experiment every couple of days”

“I cannot recommend this subscription box enough. This isn’t only because of the actual product and the fun we have encountered, but also because of the people behind the product. The customer service we have experienced has been second to none,”

Lorraine (It’s a Family Adventure)

“The attention to detail is amazing and it has been put together in a very visually engaging way.”

“The first box contained a well designed instruction sheet and all of the equipment needed to do the experiments. And I mean everything!”

Alan (Here Come the Hoopers)

Additional information

Number of months

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12