面白 おもしろがる
omoshirogaru

Godan Verb (ru)

1. to amuse oneself; to be amused; to enjoy; to think fun

Intransitive
その子供 こども時計 とけい面白 おもしろがって分解 ぶんかいした。
sono kodomowa tokēo omoshirogatte bunkai shita.
He took the clock apart just for fun.