Most definitely! Our kids are attending and would love to play and run around with other children.
If the current date is still to prior to the rsvp deadline and you haven't already sent it back then you are still welcome to bring whoever you'd like. Simply just write in the number of guests (including yourself) who will be attending and send it back. In the case that the deadline has already passed and/or you've already sent back your rsvp, please contact the bride, groom, or someone in the wedding party to verify whether or not this will be okay.