Acrylic toys are a strong alternative to wooden toys, that Parrots love. Acrylic is a very strong and non-toxic carbon/polymer mix. The best designed toys are those that have moving parts and encourage your birds to be creative., with the knowledge that it's actions will result in a treat or food concealed in the toy. These toys are designed with the knowledge we have of how a Parrot thinks and what stimulates them. X Small: Suitable for Budgies, Lovebirds, etc. Small: Suitable for Cockatiels, Senegals, etc. Medium: Suitable for small Amazons, etc. Large: Suitable for small Macaws/Cockatoos, Amazons and Greys.