Fun Wedding Card What Do I Write On My Cousin's Wedding Card?

What do I write on my cousin's wedding card? - fun wedding card

I am 13 years old, so I do not want to be super serious, just fun and happy.

I will not be, "congratulations and best wishes as they begin their new life together on." Because it is too serious for 13 one years / Writing until 22 years old. Seniority bonus.