Help I need to DIY this

[IDiyeverything]

Hi guys I want to do this for my daughters birthday she loves Alice in Wonderland and I saw this Magic Revealing Menu on the Wonderland Restaurant at the Royal Caribbean Cruise

Does anyone know what this technique is called and what materials I should use??

https://www.kiwico.com/diy/stem/quick-easy-experiments/invisible-ink-with-lemon-juice

Not quite the same but lemon invisible ink?

Or use a white candle to write on the paper and a watery paint wash over the top.

They likely use this over a standard printed menu.

It's just like normal paper but turns from opaque to translucent when water is brushed or sprayed over it.

https://www.sfxc.co.uk/products/hydrochromic-adhesive-film-sheet-white-to-clear

To make it you would just print out whatever you wanted on normal paper, laminating is optional, but probably wise if being used by children to avoid excessive water damaging the normal paper. Then put the magic paper over the top, put it all in a frame and give your DD a paintbrush and some water.