Yes, orbeez can dry out if you put them out of water or in sunlight. They can shrink to their original size. This is the most exciting thing that you will find in them. You can put them in a jar once they have dried out. Place them in water so they can grow once again when you wish to play with them. Ensure that orbeez absorbs a large amount of water, so keep checking on and add more water after regular intervals. The water must be cold and warm, not hot.