|Photo credit: Happy Hooligans|
This is such a simple activity but keeps those preschoolers entertained! You'll need some clear bottles (I really like the "Simply" juice bottles) and some river rocks from the Dollar store.
Fill the bottles with water about 1/4-1/2 full let the kids drop the stones into them.
For added fun you can also bring in little creatures to put in.
Don't forget the towels or bring one of those 'under the bed' totes. If the weather is nice go outside instead!