Invisible Lemon Ink

Squeeze the lemon juice into a small cup.

Dip a cotton bud into the juice and use it like a pen to write a secret message on the paper.

Re-dip often so the writing stays wet and clear as you go.

Leave the paper somewhere flat to dry completely until the message vanishes.

Ask an adult to gently warm the dry paper by holding it near a radiator or warm lamp.

Keep moving the paper slowly so it warms evenly, and watch the hidden message appear in brown. If nothing shows, warm it a little longer or hold it slightly closer to the heat.