My mom is the most creative person I know.
The monkeys received a handmade card from her in the mail yesterday.
It read (in part):
When I was a little girl, in the spring I used to put out bits of yarn in our garden. Within a few days it all disappeared. The birds would fly down, pick up the yarn and carry it off to their nests.
She sent a ziplock bag full of yarn bits and explained further:
The yarn should never be too long because the birds could easily get tangled up in it.