Here is a very simple and fun idea for a birthday present or a very quick DIY project.
It requires very basc sewing skills, and a few rocks!
First, cut two pieces of cloth, and prepare a socket to hold the two ropes that are going to close the bag. On one of the pieces sew a grid using a colorful ribbon and sew the three sides of the bag. Use two ropes or laces to make two loops around the top of the bag.
Remember to choose 10 rocks, beads, buttons or whatever you prefere, as long as they are of two distinct colors, to play the game.
And there you have it! If needed you can look here for the rules and strategies to the game. Enjoy!