14 Valentine’s Day Cards That Kids Can Make (Mostly) on Their Own

Mama Kate of Mini-eco shares this fab idea for making “secret message in a bottle” Valentine’s Day cards that will be sure to please the kids. To get started, dip a Q-Tip in lemon juice (a.k.a. the “invisible ink”) and write out your personalized messages on the cards. Once the card is placed over heat, the message will show up! For the bottles, Kate says that she used an old vanilla extract bottle, and the mini-colorful hearts were easily made with a heart-shaped hole punch.

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