I found a silhouette of Mickey's head by googling "Mickey Mouse Head" (brilliant, right?) and a bunch of different images popped up. I also found styles of crowns for a boy and a girl for on top of Mickey and Minnie's heads. Next, I traced the images onto fabric, attached some fusible webing to the back, and ironed the silhouettes of the heads and crowns onto the shirts. I then used a zig-zag stitch all the way around to secure the applique.
To finish, I set my sewing machine's stitch length and width to a low setting and attempted to embroider the kids' names to their shirts in a "Disney-style" lettering. Let me tell you, this was not an easy task since I don't have an embroidery foot plus I have no experience embroidering so the names didn't turn out exactly how I wanted them (perfectionist side coming out.) Looking back I would have used freezer paper stenciling to stencil the names onto the shirts, however I hadn't heard about this method at the time so I did what I knew. Or in reality didn't know :P Live and learn right?
Anyways, here they are!