Help with a fundraiser slogan in Spanish!!

Question

I'm working on a fundraiser where we're asking people to donate 1 kilogram of food (rice, flour, etc). I'm in charge of the posters and was told it has to have the words KILO solidario and caritas (the name of the organization we're donating it to).

Can someone help me with a slogan? I want to say something like this:

"Bring a kilo solidario for Caritas!"

"Donate a kilo solidario for Caritas!"

or something to that effect. (am I using the word "solidario" correctly?)

any help would be great.

Answer 1

Si nos quieres un kilo, colabora con Cáritas!

This is a slogan I just found on the web.

Regala un kilo de besos, colabora con Cáritas!

Un kilo de ayuda, colabora con Cáritas.

Or even, simply:

Un kilo por Cáritas!

Answer 2

Den kilos solidarios
Ganen sonreintes caritas

I'm not good at things like this :(