Happy Mother's Day!
One great way to add some science into a Mother's Day art project is to have your students plant flowers in a pot that they have decorated. I start a plant unit in April by reading plant books, bringing in extra plants for the students to look at, and doing several experiments with plants. We also plant a seed into the Mother's Day pot and put the pots in a sunny windowsill so that they can be just about ready to bloom in time for Mother's Day.
Each student gets a plant packet with diagrams of plant anatomy, descriptions of the plant life cycle, and scientist observation logs. The students draw pictures of their plants every few days so that they can see the changes that the plants undergo as they grow. We also make a plant book where I will bring in enough flowers so that every student gets one. They "dissect" the plant and tape each part - stem, leaf, petal, etc. onto separate pages and write a description underneath the plant part. On the cover of the plant book they draw and color a picture of their flower.
The flower book, the plant packet, and of course the Mother's Day flower pot are always a big hit with the kids and their parents!