Fun soccer game for younger kids. Link provides cutouts which you can print out and colour to make your own football players and pitch.
Balloon Cup Shooters
(Free template) Soccer finger puppets - make sure to print on cardstock so they "stay up".
Paper Ball Soccer
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Styrofoam, like the stuff from take away containers or from the grocery store, can be used to make your own stamps. (This site is in French. I tracked the photo to http://www.funnycrafts.us/printmaking-ideas-for-kids/, but there are no further instructions there. I guess they figured the pictures said it all.)