I just did this activity with my kids for Open House. Design your own dream house. All you need is graph paper and an understanding of perimeter and area. Here is a pin describing the activity from All Things Upper Elementary. I also had my kids design an outdoor space.
Mother's Day is around the corner. I love to do activities that do double duty- they're cute but they cover curriculum too. Here is a pin from Laurane Rae. It includes poetry with four ways to say I love you to mom.
Here is a cute Memory Book template from Juliette Roman. It can be used for grades 1-4. I know I treasure the memory books my kids made me.