Create a space in the house, and design a stage. You could use fabric to lay down on the floor and move some furniture around to create the stage space. 

Dim the lights and perhaps you could use a torch or your phone light as a stage light. 

Connect to a speaker if available, or play sound from your phone. Pick a scene from your child’s favorite movie, or choose their favourite song. Encourage them to pretend to be performing in front of a crowd, perhaps pretending to be one of the characters from the song or movie

Let them explore their talent: they could enjoy singing, dancing, acting, you name it!