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Thames and Kosmos Crystal NightLight

Thames and Kosmos Crystal NightLight

In Stock In Stock and Need it quick? order within:
24hrs3minsSelect Next Working Day (order by 2pm) at the checkout
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Science STEM skills Science STEM skills

Delivery Info
5(4 reviews)

Ready to grow a beautiful crystal and make it into a cool nightlight that will glow in a spectrum of colours? First grow the crystal from alum powder, then wire up the nightlight circuitry. Put the crystal onto the special platform and switch on. The colour-changing LED will light up your crystal!

The full-colour, 16 page manual gives easy-to-follow, step-by-step instructions and contains lots of really interesting information about the science of crystal formation and LED technology.


Die-cut black cardboard

Plastic base with lid

Transparent plastic cone

Colour-changing LED

2 x contact springs

2 x black screw

2 x silver screws

Black wire with eyelet and contact latch

Double contact latch

Switch with eyelet and contact latch

2 x 50g Potassium aluminium sulfate powder (alum)

Safety goggles

125ml measuring cup

Wooden spatula

Wooden stick

16-page, full-colour instruction manual

You will also need:

Two clean empty jelly jars (about 600 ml, one with a lid), paper, pencil, scissors, tape, water, old pot and hot pad, pot holders, paper towels, a piece of cardboard, sturdy string, ruler, all-purpose glue, tweezers, small Phillips-head (“crosshead”) screwdriver, two AAA batteries (1.5-volt, type LR03). 

Age 8+

Mainland delivery

Our standard delivery is £2.95 to £4.95 per order to any UK mainland address and is calculated at checkout.

Please note that offshore UK destinations ie Islands of Scilly, Isle of Man and Scottish Islands may incur a surcharge which is weight dependent and calculated as you enter your address in the checkout.

We also offer a UK 24 Hour delivery service for £9.95. If the item(s) are in stock and the order is received before 12 noon your order should arrive with you the next working day i.e. order on Friday and we will deliver "In Stock" items on Monday.

We also offer a UK 48 Hour delivery service for £7.95 if the item(s) are in stock and the order is received before 12 noon  your order should arrive with you on the working day 48 hours after your order i.e. order at 11am on Wednesday and we will deliver "In Stock" items on Friday.

Overseas delivery

We can deliver anywhere in the world. Delivery for overseas orders will be charged by weight the charge is calculated for you during checkout.

PLEASE email us for a quote on overseas orders as this can sometimes be different to that quoted online

Please contact us on 0344 89 102 36 or email us if you have further queries.

Delivery times

If all your items ordered are "In Stock" and "Standard Delivery" has been chosen you will usually receive them within 5-7 days.

Items which are "out of stock" will be sent at no extra charge to you after your first delivery.

A signature may be required on receipt  so it may be more convenient for you if we deliver to your work or an address of a friend. We will send you an email when your order leaves us. This may contain a carrier reference for you to track your parcel.

Returns and Refunds

We want you to be delighted with the quality of the goods you receive from BrightMinds. However, if for any reason you do wish to return any items from your order  please do so within 90 days of receipt and in resalable condition for either a full refund of the value of the goods or an exchange. Refunds are normally processed within 7 days of receipt.

100% of our customers liked this product (4 reviews)
Posted Rating Comment Staff Comment


Good so far.We have the crystals made, but haven't attached them to the light.Its a little bit fiddly!!


This was a present for a friend. I didn't see it in action but her latter said she loved it.


Granddaughter delighted with this.



view all feefo reviews >
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