I have been refraining from using chemical lawn services for 5 years now bec. my young children play around in the lawn and I vaguely thought it might not be good to have the standard lawn chemicals around them. But now I have lots of dandelions etc! And the kids are older. Is there an environmentally friendly, nontoxic, child-safe kind of weed control or standard lawn treatment and do you recommend any particular product, service, or lawn company? Thanks.