国
=
囗
+
玉
:
Mnemonic symbol: a nation's flag. Let's say the Chinese flag.
In the observatory's kitchen (o2) Gitta Giraffe (gu) is practising her ballet performance. She got a whole crate (囗) full of jade bracelets (玉) and flags (国) and fixed one flag to each jade bracelet. This makes a perfect combination for throwing the ring with the flag waving behind it and catching the ring again after a few pirouettes.
to worry / to concern oneself with / worried / anxiety / sorrow / (literary) to observe mourning
忧
=
尤
+
忄
:
Maud Younger (y) received a medal (尤) for her nice fail (忄) in front of the outhouse (ou1), but now she's worried (忧) that someone will steal her flail since now it is so famous.
天
=
一
+
大
:
Mother Teresa (ti) programmed a robot (大) to play a flute duet together with her in front of the anthill (an1). As they play their flutes (一) an angel (天) hears their heavenly tune and descends from heaven to listen to them.