Found it: "Disney Princess Necklace Activity Set"

Found two stores with active listings: * https://www.riteaid.com/shop/princess-necklace-activity-set * https://www.amazon.com/Disney-Princess-Necklace-Activity-Set/dp/B0747ZGTTG/ref=asc_df_B0747ZGTTG/

(My daughter had a similar Frozen-2-themed set, so that helped me search in the right direction.)