Visit your local dollar-type store to purchase three identical glass vases, three large sheets of poster board and some permanent markers. Next, at a home improvement warehouse or craft shop, choose three different popular adhesives that claim to be the strongest.
Clearly spell out your science experiment steps for each glue product using the large poster board and the permanent markers. For example, establish the following for each of the adhesives: research, problem, hypothesis, experiment, results and discussion/conclusion. Fill in each category as you conduct your experiment on finding the strongest glue.
Carefully break all three of the vases using a hammer to chip off one to two clean pieces. Repair each broken vase with a different adhesive product according to the instructions on the three separate glue packages. Allow your science fair props to dry completely and use clamps when necessary. Record your findings and determine which type of glue was the most successful in repairing the glass breaks.
To include your audience in your science experiment on finding the strongest glue, turn around your poster boards and then invite onlookers to guess which product they think worked best. Allow them to read the packaging and inspect each of the repaired items before making an informed decision. Once they have reached their own conclusions, share your results presented on the poster boards.