While most are concerned about whom their money and large assets will go to, the largest source of estate conflict is from tangible personal property; photos, jewelry, artwork, sentimental items, and collectibles. Many wills are solely written in percentage distributions (i.e. 50% to son, 50% to daughter) To alleviate this problem, attach a memorandum to your will that specifies whom you would like specific pieces of tangible personal property to go to.

https://www.kiplinger.com/article/retirement/T021-C032-S014-holistic-legacy-planning-is-about-more-than-money.html