Jell-O Model of Microfluidics

This activity uses Jell-O(R) to introduce learners to microfluidics, the flow of fluids through microscopic channels. Using wooden coffee stirrers, learners create patterns to be cast in Jell-O(R), then mix Jell-O(R() and pour it over the pattern, letting it set overnight (or over a weekend if possible). Once cured, the stirrers are removed, and water with food coloring is forced through the fluid channels. Multiple variations are shown, including one that uses pH paper as sensors, as well as suggestions and examples for different age groups. The write-up is from an academic journal, and can be useful for giving a higher-level reading assignment to students.