1. A joy to behold
   Meaning: a thing or experience that creates a profound sense of pleasure or elation in the spectator
2. Be full of the joys of spring (humorous)
   Meaning: to be jubilant.
3. Be in a transport of delight/joy
   Meaning: to feel extremely happy or pleased
4. Bundle of joy (=bundle from heaven)
   Meaning: a newborn baby
5. Burst with joy (for one)
   Meaning: to be full to the bursting point with happiness.
6. Buzzing?
   Meaning: excited for something that’s going to happen
7. Leap for joy (=jump for joy)
   Meaning: to jump up because one is happy; to be euphoric, show exceptional excitement
8. Pride and joy
   Meaning: something or someone that one is very proud of.
9. Weep for joy
   Meaning: to cry out of happiness
10.   On cloud nine
    Meaning: a person who is on cloud nine is overjoyed because something wonderful has happened.
11.   Like a dog with two tails
    Meaning: to be elated.
12.   Grin from ear to ear
    Meaning: to look very satisfied and smiling.
13.   Grin like a Cheshire cat
    Meaning: when one has a smile on his face being happy with something.
14.   Happy camper
    Meaning: to be content or satisfied with what is happening in the life and to have no complaints.
15.   Happy as a flea in a doghouse
    Meaning: to be euphoric and contented.
16.   Happy as Larry
    Meaning: to be delighted.
17.   Happy-go-lucky
    Meaning: to be cheerful and carefree all the time.
18.   Having a whale of a time?
    Meaning: to have a very good time, have an exciting or fun time
19.   On top of the world?
    Meaning: to feel ecstatic, enjoy great health, success.
20.   Over the moon?
    Meaning: extremely pleased and happy
21.   In seventh heaven
    Meaning: ?in a very happy state
22.   Walking on air
    Meaning: to be merry, to feel like you are floating on air.