Toddler Planet is written by Susan Niebur, four time cancer survivor, astrophysicist, and mom of two happy little 4 & 6 year old boys. Susan is now fighting metastatic breast cancer in her spine, neck, ribs, and hips, with chemo and pain meds, still looking for that "new normal."
http://toddlerplanet.wordpress.com/
(I met Susan when she was a senior at Georgia Tech. Even then, I knew she was very special!)