* You can fill the water table up with water and have sea animals in it.  
* Add food coloring.
* Put bubble solution in it and do bubbles.  Try to find some bubble wands or
make your own!
* Get several different size cups, mesuring cups, and big spoons they love to
pour and fill.
* Get some little boats and they can float them around in the table.
* My kids love to use the sand toys in the water table.  Not with dirt though!
lol

Freeze a large block of ice.  Put into water table. You may want 2 or 3
blocks.  Dissolve salt in warm colored water.  Pour into spray bottle.  Let
kids spray the block and see what happens.  
   
Squirt bottles with fine tips are really cool. Color the water and make it
warm. If you squirt in one spot, you can create tunnels pretty much instantly.
Kids can work cooperatively to connect their tunnels.  

Ice sculptures-Freeze different colors, shapes of ice them put them in one
container and let the kids "sculpt" with paint brushes and toothbrushes. Re-
freeze the ice in a big container so that every time it is used, it is a
different shape.

Float or Sink  Experiments:  Add  objects to the water table that float or
sink. One item to add that makes children think and discover is balloons with
different objects inside such as:  sand, baby powder, a block, marbles,
toothpicks, and just air. Supervise this closely--of course!

Water Displacement: Have bowls with water, objects to add to bowl. Put objects
in bowl until it overflows. Have children estamate how many of an boject it
willtake to overflow the bowl.

Surprise fountains: Save all of the clear containers things come in. Get the
labels off easily by filling the containers with hot water and letting them
sit about ten minutes.  Then slowly peel off label. [If any sticky stuff is
left, spray on gum-off (by in local variety store in paint section). Spray on,
leave about a minute and wipe off.] Then drill holes in the containers in
various places. ie, sides, or bottom etc., water squirts out the holes and
makes delightful fountains. Color the water if you wish. You can also add tiny
clear rubber tubing that fits in the holes, set up plastic crates in sensory
table stair step style. Kids put containers with hoses on top levels which
drain into more containers below.

Beads or sequins in water: These are lots of fun. Some kinds of beads float,
some sink. Extend by adding big clear rubber tubing. If you add basters that
fit the tubes, it's really fun to suck the beads back and forth using the
force of the basters.

Do you have Marble Works from Discovery Toys?  You can put these in the
sensory table with water also.  Add beads or sequins and watch them go down
the slides as the water is poured in.  Water can also be caught in jars at
various marble works exits.

Ping pong balls in water.  Blow with basters or straws and have races or
bumper balls.  Also can use little styrofoam balls and little balls popped out
of empty deoderant bottles.  Wash them first with soap and water or boil. If
you draw faces on the ping-pong balls then you have Humpty-Dumpty's swimming
pool.  Draw faces on deodorant balls for Humpty-Dumpty's babies.

Any of the above water activities with silver or other colored reflective
mylar in the bottom of the sensory table adds another fun dimension!
  
Change the temperature of water(of course avoiding "hot")

Color water with food coloring

Let your children wash items such as dolls,doll clothing,or plastic dishes

Discover the properties of water with laundry scoops, measuring cups, plastic
bowls, strainers, sponges,s queeze bottles,  bottle brushes, corks and plastic
scrubbers.

Whip liquid soap into water with a whisk

Pour baby oil or vegetable oil into water what happens??

Try peppermint, spearmint or another kind of extract in the water---the smell
is terrifc!

Add ice cubes,icicles,snow or salt water to encourage science discoveries

Make "ICE CASTLES"....freeze colored water in different kinds of containers (
milk cartons, margarine tubs, Bottles, etc.) peel off the container and let
the children stack and make their own ice castles.

Have ice cube races.  Make colorful cubes with food dye.  Devise an incline
using a smooth surfacce like a vinyl tile.  Race the ice cubes down the
incline.

Freeze large blocks of ice in trays without dividers (remember those?).
Unmold and allow children to sprinkle salt on them.  Observe the fantastic
shapes produced by the uneven melting.

Have an ice cube melt race.  Give each child a cube and encourage them to find
ways to quickly melt their cube.  

Create ice cube rivers.  Make a sand mountain and place ice cubes on top.
Watch the melt water make rivers down the side of the hills.

Create ice cube pictures on the hot sidewalk.  Look at the design made by the
melted cube on the walk.

Give children cubes and containers.  See how many cubes the children can fit
in each of the containers.

Waterplay Activity--Place empty paper cups on a table, wall, ledge, ect. out
doors.
Fill empty dish detergent bottles (or any squirt type plastic bottle) with
water and the children can try to knock over the cups by squirting them with
water.