Just finished the water cycle so this is great! Water cycle bag - I used to do this demonstration with third graders. add a drop of blue food coloring to the water if desired. A very effective experiment that works best in a sunny window.
This activity can help children with angles. Instead of measuring angles on paper, this can illustrate angles into a read life demonstration. This is active learning because as children close the door the angle changes and they can now measure it.
Place Value Paint Samples. could make this larger to add places. Going to have to get the paint chips with more colors to make bigger numbers. Would be great help for my students who still struggle with place value.