Did you know you can make great invisible ink from lemon juice? Armed with this new bit of knowledge I put my thinking cap on and came up with the idea that invisible ink + message in bottle = cool valentines day gift! The invisible ink bit is easy.
To make this fizzy potion you will need: ♥ A container (something see-through works best) ♥ White vinegar ♥ Food colouring ♥ Washing up liquid ♥ Bicarbonate of soda (aka baking soda) ♥ The enthusiasm of a child! ♥ A tray