
The children were shrieking with delight as they played in the pool.Scream/shout/shriek with delight cry/shout/weep for joy to behave in a certain way because you are feeling very happy: Nick was on top of the world after winning the award.On top of the world very happy because things are going very well for you: Two weeks after getting engaged she is still walking on air.

Walking/floating on air so happy that you feel that everything is wonderful and nothing bad can happen: We were overjoyed by the support we received.Overjoyed very happy, especially because there has been a successful outcome:
