Experiments for Exploration
Let preschoolers explore bubbles by providing many opportunities. When they are outside, children can have traditional fun blowing bubbles through wands. Make your own wands by bending wire into different shapes to see if the shape of the wand affects the shape of the bubble. Set up a large tub of soapy water so that they can try other items such as hangers and string tied to a stick. Tie together a bunch of straws for multiple bubbles. Try straws of different lengths to see if that makes a difference. Let them experiment with other objects that they think may be able to create bubbles.
Practice catching bubbles. See if it is possible to catch bubbles by hand. Compare using a wet plate with a dry plate. Try to capture them in a bucket of water or in a jar. Catch them on wands, buckets, toys, or anything else that is available in the classroom or on the playground.
Have children experiment with making their own bubble solutions. Have them determine which kinds of soap work better and how much of each soap needs to be added before the solution works. See how glycerin affects the mixtures. Try using soap mixtures and immediately compare them to ones that have been sitting out all night.
Compare solutions of soap and water (with or without glycerin) to solutions of soap and another liquid, such as white vinegar. Try water mixed with different substances.
Think of other ways to make bubbles inside the classroom. Use a wire whisk or rotary beater to create bubbles from dish soap or grated soap flakes in a bowl of water. Add dish soap to a bowl of water and use a straw to blow bubbles in it.
For something a little different, blow bubbles onto a plate and put them in the freezer. Compare those to bubbles blown near a heated surface, such as a furnace or near a hair dryer. Try to make bubbles using different temperatures of water.
Try to create new colors of bubbles. Add food coloring or nontoxic paints to the bubble solution.
Ask children for their ideas on variations for science experiments using bubbles. You never know where their curiosity will lead!