Well although red fronts are smaller, most macaws I have owned or worked with did not like wood there size, my macaws usually stick to 1x6 which is very thing or a lathe like peice of wood like what noble has shown. I'd also say cardboard boxes and phone books my macaws love. They love bells and anything to make noise, I'm big on forgagin so my guys ether have a lot of it or are learning to forage with many forgaging toys in there cage. The plastic animals are great, but most of mine rip the poly rope before they play with the toy. I also give mine acrylic toys, most of them like to mess around and solve stuff with them, or bang them around lol!