Tag Archives: spy

45_Secret Messages (Invisible Ink)

30 Dec

Ever wondered how spies and secret agents make secret messages?

© 2011 Fernanda de Uriarte

WARNING: It is really quick and easy to make secret messages, however in order to make secret ink work you need fire, so this toy requires adult supervision.

You’ll need:

_Half a lime

_A thin brush

_A piece of paper

_A lighter

_Adult supervision

How to make secret messages:

1. Dip the tip of your brush into the lime. You can also squeeze the juice out of the lime into a container and dip the brush into the container.

2. Write your message onto a blank piece of paper. You’ll need to get more invisible ink (lime juice) every letter or two.

3. Let the lime dry for a few seconds. Your piece of paper will look as if it had nothing on it.

4. To reveal the message, get an adult to pass the flame of a lighter gently under the paper, all the way through your secret message.

© 2011 Fernanda de Uriarte

Watch letter by letter appear in front of your eyes!

© 2011 Fernanda de Uriarte

© 2011 Fernanda de Uriarte

© 2011 Fernanda de Uriarte

© 2011 Fernanda de Uriarte

Be careful with the lighter… you don’t want to burn too much. (have some water next to you, just in case)

© 2011 Fernanda de Uriarte

Think twice next time you find a blank piece of paper!


(Thanks K!)


23_The Spyscope

12 Jun

Ever wanted to be a spy? Wondered what your little brother is doing? Wished you had something to spot mum when she comes so that you can be good again (without her spotting you of course)? Please welcome the Spyscope, the ultimate tool to see around the corner without leaving your room.

© 2011 Fernanda de Uriarte

This one will take you about 45 min to make.

You`ll need:

_To download and print these files:







_6x A4 pieces of card (remember you can always recycle cereal boxes, the back of empty paper blocks, etc.. )

_A mirror about 9cmx9cm or 9cm in diameter if you can only find a round one. (make sure it´s no bigger than 9cm otherwise it wont fit within the blueprints I`m posting)

_Cutter or Exacto knife and a cutting mat or surface to cut on.

_UHU glue.

_Someone to spy on.

How to make your Spyscope:

1. Download and print the files above. If your printer takes the card, you can print directly on it, otherwise, print on regular paper and stick it on the card.

2. Cut all the pieces and fold as appropriate.  (Cut over the black lines, pass over the red dotted lines without cutting all the way through and fold backwards, pass over the purple dotted lines without cutting all the way through and fold towards the front.)

3. Using some UHU glue stick the mirror holder together. It will look like a triangle.

4. Stick the mirror on the base of the triangle.

5. Put some UHU glue on the sides of the mirror holder and stick it to the top 1 and top 2, as shown in the image below.

© 2011 Fernanda de Uriarte

6. Join the ends at 45º. You should now have the back and top of an “L” shape.

7. To close the “L” shape, get the shapes bottom 1 and bottom 2 and stick them together as in the image below

8. Put some UHU glue on the tabs of the 2 pieces of card you just stuck together and stick them to the piece with the mirror holder.

9. Put UHU glue on the tabs on the piece with the mirror holder to completely close the “L”

10. Get the piece called viewer and stick it on one end of the “L”.

11. Stick the end piece on the other end of the “L”

© 2011 Fernanda de Uriarte

Done!!! now you`re ready to spy.

© 2011 Fernanda de Uriarte

Can you see my eye on the other side?

© 2011 Fernanda de Uriarte

Is that a crocodile and a muppet around the corner?

Happy spying!