For Your Child Who Can't Separate Try this game.

“If your kid has separation anxiety, try playing peek-a-boo or hide-and-go-seek. If you have a baby, maybe hide behind a book and say, ‘Where is mommy? Peek-a-boo there she is!’ For older toddlers, go behind a column and poke your head out. If you practice going away and coming back, it helps them separate. It reminds them that they can do this, and that people come and go and come back.”

– Dr. Aliza Pressman