First Playdate with My 2 1/2 Year Old

i would prepare yourself for 2 hours TOPS. Bring along a snack to share with everyone (mini-muffins? pumpkin bread?) and whatever bottle or sippy cup your normally pack for him. Don't be surprised if the kids don't play together at all (parallel play still at this age) or if they fight over toys. They won't be used to taking turns, so expect a little bad behavior and you won't be upset by it. Model how you want them to play together and distract if trouble starts-- "See, it's suzie's turn with the toy now, it will be your turn in 5 minutes. why don't you play with this other thing now..." If all goes well enough and you want to see her again, you can invite her for the following week, same day and time. Maybe you'll get into a groove and play every wednesday.
Good luck, have fun, enjoy the new friend!

I agree with the other posters. I would definitely take a snack for your son and something for the other little child. I don't think you need to take a drink for the other little girl, but take one for your son. Take some of your guys favorite toys too. At 2 1/2 kids are still into parallel play, so they may not even take much notice of each other. HOWEVER, at this age it's about the Mom's :) It's about you connecting with her and giving BOTH of you a bit of time to converse with another woman. It's nice that you found someone! :)
If the playdate goes well and you get along with the other woman, I would just ask her if she'd like to meet up again. Offer your home for either the following week or a week after. Have fun! :)

I would expect it too last 1-2 hrs with that age group , take what you would normally take out for your son (diapers , drink/snacks) , I am sure she will offer you a drink. You could offer to have the playdate the follwing week at your place and see what she says , she may be busy or what to arrange it asap.

Have fun it will be fine

At this age and visiting someone you don't personally know I would plan an hour tops. I feel if I hated it and the child then I could do anything for an hour.

I would also make sure everyone I know knows where I am going and with who. I would have never agreed to go to someones home I don't know, the first 4-6 play-dates would have been in the park or at McDonalds to meet and get to know this person. Maybe not even going to their home until I knew a lot more about them, maybe even months and months of play-dates at an alternative place. You can never be too careful when it involves your kids and your self.