I know what you're saying! I hate roaches also. It sometimes doesn't matter how clean your house is, they can find things to eat everywhere!
I've been told a roach can live off a fingerprint for a week. Also can live without their heads for a while too.
We have gotten ourselves an exterminator due to our brown spider problem. Our spider problem went from moderately bad to non-existent. I'd recommend our bug guy and the company to anyone. I didn't check out where you live, but if you live in the Wichita area, call Patton & Keehn at ###-###-####. Our guy's name is Van. You can ask for him, he will treat you right.
Don't be scared of the chemicals the pros use. We haven't had any problems, just the satisfaction of NO BUGS!!
Regarding your son's toys... there shouldn't be any problem. If it makes you feel better, do ahead and clean them.
You better do something quickly about this... they spread fast. If you've seen one, there are many more!
Good luck! You could try to get rid of them yourself, but it will take longer! They are pretty hard to get rid of without professional help.
Hope this helped! ls