Hidden Rainbows Letterbox Science Kit By Letterbox Lab | notonthehighstreet.com
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Hidden Rainbows Letterbox Science Kit

by Letterbox Lab



  • made in britain

Everything you need to play with science straight through your letterbox! A science kit especially designed for little explorers with inquisitive minds.

With this innovative science kit, your child will explore light and colour as they’ve never seen them before. Discover the true colours of Incredible Inks, turn the world into rainbows with hand-made Rainbow Glasses and squeeze all those rainbows back together again with Rainbow Spinners. The kit is a miniature version of our Investigate Box, Marvellous Mixtures, suitable for younger children.

Everything you need is included, plus a a 12-page illustrated instruction booklet, and it fits through most letterboxes. Playing with science has never been so easy!

Hidden Rainbows is for children aged 6+, for use under adult supervision.

made from:

Packaging: cardboard box, paper bags.

Contents include petri dish, spinning top, paper and card, diffraction grating, felt-tip pens, pencil, (see photos for more details).

This product is recommended for children aged 6 years and over, and should be used under adult supervision. The product contains small parts which pose a choking hazard to children under the age of 36 months. This product fully conforms to the Toy Safety Directive.


H2.5cm x W20.0cm x L30.0cm

product code:


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  • This product is dispatched to you by Letterbox Lab.


  • You have 28 days, from receipt of cancellable goods, to notify the seller if you wish to cancel your order or exchange an item.

    Please note: goods that are personalised, bespoke or made-to-order to your specific requirements, perishable products and personal items sold with a hygiene seal (cosmetics, underwear) in instances where the seal is broken are non-refundable, unless faulty.

    Read more about our returns policy.

    Should you choose to return or exchange your order you will need to deliver the item(s) to the UK, where this seller is based.

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