Apple theme: Apple Science Experiment for Preschool and Kindergarten. A Super Simple and Easy Science Experiment for your kids to explore. Make predictions and record observations as the apples oxidize.
Might be easier to beef some of these up for kindergarten then try to make other activities appropriate. STEM for Preschoolers 10 Science Technology Engineering Math Ideas for 3 to 4 Year Olds Left Brain Craft Brain Pin
Pumpkin Science Experiments and Fall Science Activities