Check out this owl-shaped bookend from Etsy artist Aprilfoss:
Pretty cute, huh? And, at $26, relatively affordable. Aprilfoss's owls come in a wide variety of colors and fabrics, and each one should be strong enough to hold up a couple of kids' books. They are stuffed with dried beans, so I'm assuming I should be warning you about choking hazards or something—so don't let your kid gnaw through the fabric, okay?