On A Kick
(idiomatic) Having a period of enthusiasm towards some activity.
Example: 1994, Marjorie L. DeVault, Feeding the Family: The Social Organization of Caring as Gendered Work, p. 145:
And he is now on a kick of having me make orange juice, rather than buying the frozen concentrate.
2013, Kate Woodruff, Central Michigan Life, Fruitful beginnings: Students create plans for fruit business
They have a great idea, especially since everyone is on a health kick lately.