I entertained my preschool class with this activity, but any age can do this. All you need is a sheet and a lightweight ball or beachball. A nice number for this activity is six persons. Everyone grabs an end of the sheet. Place the ball in the center, then everyone waves the sheet up and down. The object is to keep the ball inside the sheet. My kids loved it! If you have enough room, this activity can be done indoors too.