This open source heart and activity monitoring system would be a great kit. I'll put it on the todo list.
A few weeks ago, my doctor told me to keep an eye on my heart with the help of DIY toolkit BITalino, and I wrote about it in Why my doctor prescribed me open hardware. Although I could keep slapping a bunch of cables and a PCB on me every day, miniaturized physiological computing devices are pretty fun to build and play with—at least for me—so I decided to make myself something more practical.
Source: How to build a DIY heart and activity tracking device opensource.com via Open Electronics
Learn more at: http://paxinstruments.com/diy-heart-and-activity-tracking-device/