Bury the hatchet … and a time capsule while you’re at it! This is a serious undertaking that requires teamwork, creativity and well-planned digging. Sisters are perfect for the task at hand. Tuck away memorable keepsakes that will surprise and delight future generations. Enclose secret passwords, keys to unlock that mysterious chest of drawers, or maybe just some touching photos and one-of-a-kind artwork. Dream big, but don’t forget to mark the spot!