The Selenite Palm Stone is fantastic to one of the best crystals to use during meditation. One of the main reasons they have been polished into a 'palm stone' is so it is easy to hold in your palm.
Selenite is thought to be one of only a few crystals that can cleanse and recharge both itself and other gemstones, especially quartz. Selenite calms and soothes, bringing a deep peace and sense of tranquillity.
Selenite is said to have a very fine vibration and energy to it, which helps with nurturing a clarity of mind.
If you have restless kids or hyperactive kids, perhaps placing one of these in their room would help in calming them.