Yarn balloon spheres: Cut strands of yarn, blow up balloon. Mix equal parts craft glue & water. Dip yarn in glue, wrap around balloon. Hang balloon with clothesline & clothespin. Once dry pop balloon and remove. Modge-podge could work too.
Leilah's elf Twinkles will do this on her bedroom door to cute Children craft ideas Christmas decoration snowman door. This would be cute for the door of Charlie's room when he's old enough to not rip it all off.