Experts and BHG readers answer.
yard full of stickers
Well, this year there's not much you can do -- or that you SHOULD do, given the season is winding down.
Next year, apply a crabgrass preventer + fertilizer, which will keep a lot of the weeds and stickers out. Then, water the lawn, if you have an adequate water supply. This alone will keep the yard much more hospitable for the kids.