A crotalum was a kind of  clapper used in ancient Greece.

They consisted of a split reed or cane, which clattered when shaken with the hand.

We will make a cardboard crotalum.

You need:

• Cardboard;
• A 8 diameter glass;
• Scissors;
• Plastic or metal stoppers;
• Adhesive tape;
• A black marker;
• Pencils or felt-tip pens.

1. Place a glass or an adhesive tape on the cardboard;
2. Draw the perimeter by the black marker;
3. Repeat number 1 and 2, the second circle must be joined to the first;
4. Cut off the silhouette;
5. Bend the cardboard and glue a stopper in the middle of each circle;
6.  Decorate the outside side as you prefer.

Here are some pictures you can print and use to decorate your crotalum.