diff --git a/_includes/filter_neighbourhood/filter_mean_skimage_napari.py b/_includes/filter_neighbourhood/filter_mean_skimage_napari.py
index 9153f9c1..756866bc 100644
--- a/_includes/filter_neighbourhood/filter_mean_skimage_napari.py
+++ b/_includes/filter_neighbourhood/filter_mean_skimage_napari.py
@@ -17,11 +17,13 @@
 
 # %%
 # Appreciate that one cannot segment the nuclei by a simple intensity threshold
+# Activity: Explore different threshold values
 binary_image = image > 40
 viewer.add_image(binary_image)
 
 # %% 
 # Define a circular structural element with a radius of 1 pixel
+# Activity: Explore different radii
 from skimage.morphology import disk
 radius = 1
 disk_radius1 = disk(radius)
@@ -51,4 +53,4 @@
 # %%
 # Now the nuclei can be segmented
 binary_mean_disk_radius3 = mean_disk_radius3 > 32
-viewer.add_image(binary_mean_disk_radius3)
\ No newline at end of file
+viewer.add_image(binary_mean_disk_radius3)