Bug spray for 16 month old

We're going to Bangkok/Phuket for a couple of weeks at the beginning of April. I imagine it'll be very hot and humid, so we plan on dressing our 16 month old in shorts and short sleeves, but I'm worried about the mosquitoes. I've heard the mosquitos in Thailand are way worse than here in the US so it wasn't even worth it to bring our own bug spray. I'm concerned about the chemicals in the bug spray in thailand and wonder if there are any effective bug sprays that won't be as harmful on her skin.