Cap City Biohackers: DIY Lab Hack - Incubator Part 3

Our DIY Incubator project continues! Join us at the Idea Foundry as we assemble version 1 of our incubator and test it out. Here's some ideas on how we'd like to improve the design:
1.) Digital readout for displaying temperature
2.) Interface for easily adjusting the temperature
3.) Improving the heat source

Got ideas for how to improve on version 1? Post your thoughts in the comments!