If you look at children 14 and under, 390 drowned, and 376 died by firearms, including accidents, murders and suicides. And if you only look at accidental firearm deaths, there were 62 for children 14 and under, and 123 for 20 and under. Pools really are dangerous, even compared to guns.
Using Consumer Product Safety Commission 2008 numbers for drowning, and the anti-gun group Children's Defense fund numbers for firearm deaths.
http://www.cpsc.gov/en/Newsroom/News-Releases/2012/New-CPSC-...
http://www.childrensdefense.org/child-research-data-publicat...