Here, let me show you. You get a piece of paper, fold it and cut out a heart like this.

7031 seconds sound clip from the Be My Valentine, Charlie Brown movie soundboard.

You can hear this line at 00:10:35.185 in the DVD version of the movie.

Quote context

[...]

- You should see the big box of candy that he bought me.

- I've gotta give him something that's just as good.

- Why don't you make him a valentine with your own hands?

- What do you think I've been trying to do?

- I can't even draw a good heart.

- Here, let me show you. You get a piece of paper, fold it and cut out a heart like this.

- Try again, Sally.

- Well, that is something you can do too, Sally.

- Let me try. You take some paper, fold it like this. Then you cut some diamonds, hearts, moons.

- Then when you open it, you'll have something very nice.

[...]