Attendance as they walk in! A quick get to know you/math (counting and graphing) activity. Later in the year students can generate the questions and write them. Place on light colored paper, laminate, and questions can be added with white board marker.
Shaving foam and powder paint mixing and mark making. This is another good example of AFFINITY SPACE and it has all the facets of triggering curiosity- Empowering Pedagogy for Early Childhood Educators