Trim back any frayed rope pieces. Take note if toys are made with glue that is Elmer's Glue. Elmer's Glue is non-toxic and when dry it is safe to use. Most other glues contain Zinc which is toxic to birds. Interest shapes on parts.
Quick Links are a good method of attaching toys to cages.
Do not use key chain rings. Always ensure quick links are tighten securely. Many accidents and deaths have occurred due to negligence of loose quick links. Remember to check quick links daily to ensure they are fastened securely. Get to know your bird.