There is an ancient legend from Japan that says that anyone who folds 1000 origami peace cranes can make one wish to be granted. Peace cranes are easy and fun to make, and the process of folding and bending paper can be a calming and mindful experience.
When you accept the challenge, more information will appear in the 'open challenges' section. Here you can download the resources you need to take on the challenge, and you can write your journal after taking part.