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.
Hand painted tree rings - would recommend putting all tree rings on a board (which could be painted a coordinating color to add pop to the art piece. Really neat idea for after school kids. Might just do 9 rings in a square frame!
Space fine motor activity - using tweezers to get the stars out of hair gel ("alien gloop"!) - Tap the pin if you love super heroes too! Cause guess what? you will LOVE these super hero fitness shirts!