This is a fun idea for something to give to mom or grandma for Mother's Day. It is something a child can do well enough on their own so the item is uniquely theirs.
This is something my children gave to me last year under the direction of my husband.
Buy some wooden flowers. Many craft stores will have these--especially Michaels. Then you can buy a "vase" of some sort. My husband made this vase from wood, but you could buy a real vase or buy a wooden box.
Let the children paint the flower(S) as they want to. Let dry and give to the mom in your life! I have mine sitting on my computer desk.