This app was mentioned in 2 comments, with an average of 7.00 upvotes
For any non-pediatricians who may find themselves in this situation, know that most of us have paid the $5 for the Pedi STAT app.
The opening screen asks for the age, weight, or height (whichever one you happen to know). Then it gives you the dose of every interventional med you can think of. Also calculates vent settings, tidal volume, etc. Can be a godsend during an emergency.
https://play.google.com/store/apps/details?id=com.qxmd.pedistat
Guys at my station love Pedi Stat