This is such an easy, easy thing to do. When we have an extra 5-15 minutes (usually on Friday when I plan lightly) I love to incorporate compliment circle. We sit in a circle and take turns giving the person on our right or left (whatever you choose) a compliment. Now my kinders have gotten really good at saying "I like your shirt, shoes etc." Soooooo, yesterday I challenged them to talk about what quality they especially liked about that person. This lead to a lot of blushing, smiling, and many warm fuzzy feelings. It was as simple as saying "you are a really nice/fun/helpful person". Afterwards there was a lot of hugging. So cute!!!!! (and a great way to end a crazy week)
Sometimes I purposely put this in my plans on a Monday to start out the week wonderful!