If you're pressed for time, this card goes together fairly quickly.
If you have a little more time, try the seven flower version. It's easier to make than it looks!
I made this pop up flower as a birthday card, but it could easily work as a Mother's Day card.
I adore the gorgeous flowers in this window box. You can make them with punches if you have them.
This is another birthday card that would work for Mother's Day.
The red looks a bit Christmas-y. How about a blue background and we'll call them blueberries?
Shhh! Don't tell my mother, but she's getting an explosion box this year. Not too much like this one though, it's too girly.
Scroll up and click on "Mother's Day" in the Quick Finder over there ------> in the right column for more (non-flower) Mother's Day card ideas.
Extreme Cards and Papercrafting: pop up cards, movable and mechanical cards, digital crafts and unusual papercrafts.