Thanks ladies! I was getting ready to purchase a diffuser from Amazon but most have really bad reviews, any recommendations?

No peppermint or Eucalyptus with kiddos that young.@leowifey,

I love patchouli

DoTerra or Young Living are the only brands I'll use.
I definitely second Lemon+Lavender. So good!
Lavender+eucalyptus
Lavender+peppermint
Tea tree oil / ylang ylang
Grapefruit (or any citrus) always smells nice too.

I use doterra. I like to diffuse lavender and lemon together. It refreshes the air.