Reveal the Circulatory System

Materials Required:
Lemon juice or baking soda and water (for invisible ink)
Cotton swabs or paintbrushes
White paper
Crayons or markers
Heat source (e.g., lamp or iron) or a vinegar solution (if using baking soda)
Steps Involved:
Prepare the invisible ink using lemon juice or a baking soda and water mixture.
Draw a model of the circulatory system on a piece of white paper using crayons or markers.
Using the invisible ink, carefully cover the drawing, allowing it to dry.
Reveal the hidden drawing by applying heat (for lemon juice) or spraying a vinegar solution (for baking soda).
Discuss the components of the circulatory system and how they are represented in the drawing.