hobbyhorse

English Thesaurus

1. a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride (noun.artifact)

hypernym	:	plaything, toy,
definition	:	an artifact designed to be played with (noun.artifact)

part holonym	:	rocker,
definition	:	a curved support that permits the supported object to rock to and fro (noun.artifact)

2. a topic to which one constantly reverts (noun.cognition)

hypernym	:	preoccupation,
definition	:	an idea that preoccupies the mind and holds the attention (noun.cognition)