No, the statement "But tricks are for kids" cannot be considered as an allusion. An allusion is a reference to a well-known person, place, event, literary work, or art. It is a literary device that adds depth and meaning to a piece of writing. The phrase you mentioned does not refer to any specific person, place, event, or work, so it does not qualify as an allusion. Instead, it is a proverbial saying often used to imply that deceptive tactics are more suitable for children than for adults.
