On a tray, place a pile of baking soda. Mix vinegar + a few drops of food coloring in a cup. Give the kids an eyedropper. Have them fill it with vinegar, squeeze onto the baking soda and watch mini volcanoes erupt!
"Babies love cooling off in our gentle tide pool, with extra-soft sprayers to splash in and explore. As baby becomes more comfortable in the water, you can make the "fountains" higher (just turn up the pressure of your garden hose). There's even a pat mat area with floating 3D fish. With fun undersea graphics (tickle a turtle; cover the whales' blow hole!). For ages 12 months and up." $22.95