I have a thing for buying my kids numbered shirts for their bdays.  Don't know how it started.  But it's birthday season at our house, as we have one September birthday (mine!), one February birthday and three May birthdays!   So the hunt for cool numbered shirts began in December and I fell in love with Olive & Ollie's appliqued tees.  Check them out!

If you contact them, they'll do custom work.  We got a "3" shirt made with custom blue paisley, as her favorite colors are red and blue (big sis has laid claim to pink!).  Here's the pink version and lounge pants to match:

And a great big sibling gift: