Do ultrasonic pest repellers really work or is it a scam?

I have a carpenter ant problem in my house and I have two children under the age of 3. I'm hoping someone could recommend an effective solution for my situation. I don't want to use poison of any kind. Thanks!

Heres an example...

what is the recmanded amps for a Load Center for a trailer house?

What stores in Canada sell hand tools?

Need to wire Fuse Box for 220 (Electric Dryer) 2 open fuse holes available. What is the best way to do this?

I am putting in a slider door and there is about a half inch gap all the way around the frame. Why?

What is the correct way to iron a man's shirt.?

I have 4 beautiful plants growing in one small pot. How can I safely transpalnt them into separate pots?

How do I hook into a FULL 100 amp fuse box to run a gfci plug outside?.?

What are the proper angles to cut crown molding for 90* outside corners?

Is it possible for me to splice romex cable together?