Something that has been brought up several times is how limited Child's menus at many of the restaurants can be...
Just a suggestion, if it's not on the menu, it doesn't hurt to ask. I remember that last time we had the regular
Disney Dining Plan, we were at Via Napoli (or was it Tutto Italia?) and my son wanted the shrimp scampi pasta, but it wasn't on the Child's menu. We asked the server if they could do a child's portion of it and it was no problem (and it still counted as a Child's TS credit). Obviously this is YMMV from restaurant to restaurant and server to server, but again, it doesn't hurt to ask!