Draw a picture with glue, sprinkle salt, dip a paintbrush in water and food coloring and touch it to the salt...kids will be mesmerized.
For camping or late nights at the beach? Leave 1/4 of Mountain dew in bottle (just dont drink it all), add a tiny bit of baking soda and 3 caps of peroxide. Put the lid on and shake - walla! Homemade glow stick (bottle) solution. kids
Over 20 Water Bin Play Activities For Kids