Joint Birthday Party-Gift Opening

I do not think it it necessary to write anything on the invite about the party schedule (i.e., when gifts will be opened). People do what they...or more like it...what their kids want to do when at a party. I have never felt obligated to do anything at a party except to have a good time :)
I had a joint party for my kids last year and we opened gifts right after having cake. Most people were sitting around eating cake. My mom helped my daughter open her gifts, while at the same time my mother in law helped my son open his. It was a little crazy, but it worked for us.

Have the kids open the gifts at the same time... or not at all until people leave. Most kids go run off and play or snack on cake during the present opening anyways. It's pretty standard practice that gifts are opened at the end of the party. No need to write it on the invite.

We have never had our kids (boy - 4, girl - 2 1/2) open at the party. It is afterwards, after naps. We don't put it on the invites. The kids are usually having fun, so we just hold off.

I don't think that you have to let anybody know about it.

if your having it at a place just don't worry about it. put the gifts in a big bag and put them in the car for opening later. However if this is all family they might want to see it.

It is tacky to put any mention of gifts on an invitation except for the line "no gifts please" if you don't want gifts.

i wouldnt do it at all until youre home and so is your nephew (or everyone leaves if the party is at home).. theyre very close in age.. id honestly be worried that theyd end up fighting over a gift or one would get upset because the other got something he didnt .. its not always expected that the kids will open presents at a party ..ive been to partys where theyve done both.. it didnt really matter either way.. i wouldnt make a big deal out of it id just casually mention to the parents towards the end of the party that we're not going to be opening presents til everyone goes home so after cake youre more than welcome to stay and hang out for a while if u like if not feel free to go home after cake

I have never seen anything on an invitation about when gifts will be opened. The vast majority of parties we have attended recently have had no gift opening at all - they just do it at home alone after all the guests are gone. I don't think you need to put anything, as I doubt very many people are expecting gift opening to occur sometime in the middle of the party.

Just do not open gifts.

You don't need to let anyone know, it's a common practice. Alternate the children opening gifts at the same time, first your 2 year old then the 3 year old, assign a helper to each to hand them an item and take the one just opened and put it aside, that's what we do : )

Since you are deciding to open gifts at the party, then, the guests will have to sit through 2 toddlers opening a bunch of gifts. Regardless of when you do it.

Depending on the number of attendees at the party, gift opening, just for 1 kid, can take about 1 hour. I know, I have sat through it. Because, when opening gifts you need to: sit there with the kid, take each gift and then help them open it, then oohh and aahh at the gift & the card attached to the gift, thank the person who gave it, and write down on a note pad who gave what gift so that you can write thank you notes later, and then take photos of the child with each gift.
So, all of that takes time. A lot of time.
And, most young kids (or even adults) really get antsy during gift opening.

There is no need, to write on the invitation to notify them that gift opening is at the very end of the party.
Because regardless of when gift opening is, it will take a lot of time.

Or to save time at the party, just open gifts at home after the party.

You don't have them open them at the party...

My son will be 4 this year and it will be the first time he's opened his gifts in front of the guests. We didn't do it in the past because we didn't want it to be a problem with the toys getting grabbed by other kids at the party and my son likes to open each one after it's been unwrapped to play with it so we figured it would take twice as long to open them. What we did instead was have him open them on his own time and we took pictures then sent a picture of him opening the person's gift with the thank you card. It made for much less chaos.

You may find it easier just to skip the gift opening and do it at home later, where the gift can be more appreciated. If the kids are having fun, including the guests of honor, then leave it for home. Parties can be overwhelming for small children and making a bunch of them sit through gift opening can be torture. See how things go, if you want to open gifts at the party then make it known at that time that the other children are not required to stay if they loose interest. Also make it known that you are letting your child decide when to stop opening as well, if he looses interest, its over. Most people understand that kids especially at 2 & 3 have very short attention spans. So thank them for the gift they brought and move on. No need to include this process on the invitation, everyone does party planning differently, so there should be little expectation. Also keep in mind that your child may become focused on one toy and not be interested in any other presents. Or a gift may be opened that another child falls in love with and begins to play with it then and there. Just things to think about.
Good Luck

most parties that I have been through have not opened any presents until all guests left. Only 2 parties had the kids open them first.