My niece just asked me for a felt board. She saw the applique dresses/overalls for the Sunbonnet Sue/Sam quilt that I am making her & insisted that I didn't need to sew the pieces together. After wasting some time trying to educate her about what makes a quilt (she is surprisingly interested & says she wants to start learning when she is 6), I started asking about if she would like a felt board. She LOVED the idea! So ... I know what she's getting for Christmas.
I'm going to make a simple, lightweight feltboard out of cardboard and felt & then cut the pieces out of fabric and either serge them or maybe, if I'm too lazy, just put some FrayCheck on them and call it a day. She's a very imaginative little girl and I know she will derive hours and hours of fun from such a simple toy.
EDIT: Just saw she lives far from you, so a board isn't super practical, maybe just a nice folded piece of felt with a couple grommets or clips on the top so she can hang it where she desires.