Thank you very much for viewing from among so many items (*^^*) There are one 3mm and one 4mm hole. * It's easier to turn, but the difficulty level is higher (((^_^;) ✨✨There's a video on Instagram of a child playing with it skillfully ^^ * The photos are examples. We will ship an item made in a similar style. Simple assembly is required, just insert the pieces. Recommended for foraging-loving parakeets ^^ Please put treats or favorite toys inside the foraging toy and let them play! We strive to make them carefully to meet your expectations. * We have tried to chamfer the corners and sand them as much as possible. * The photos with the parakeet are reference photos. We have received good reviews, but they are handmade. I am not a professional (^_^;) There may be cracks or scratches. Please purchase only if you understand. Materials: Rush grass, domestic cypress, domestic cedar, Japanese pagoda tree, balsa wood, apple and persimmon branches, loofah, papaya, corn husks, rattan, genuine cowhide, paper yarn, hemp twine, cotton twine, perches, bird gyms, bird athletic courses, foraging toys