diff --git a/lockdrop_calculations.py b/lockdrop_calculations.py
index b980028..2533b9d 100644
--- a/lockdrop_calculations.py
+++ b/lockdrop_calculations.py
@@ -685,20 +685,20 @@ def create_experiment_widgets():
     # Create input widgets
     print("="*50)
 
-    # Star participation widgets
-    stars_1_years = widgets.IntText(value=default_participants['stars_1_years'], description='1 Year:', style={'description_width': '80px'})
-    stars_2_years = widgets.IntText(value=default_participants['stars_2_years'], description='2 Years:', style={'description_width': '80px'})
-    stars_3_years = widgets.IntText(value=default_participants['stars_3_years'], description='3 Years:', style={'description_width': '80px'})
-    stars_4_years = widgets.IntText(value=default_participants['stars_4_years'], description='4 Years:', style={'description_width': '80px'})
-    stars_5_years = widgets.IntText(value=default_participants['stars_5_years'], description='5 Years:', style={'description_width': '80px'})
+    # Star participation widgets with bounds
+    stars_1_years = widgets.BoundedIntText(value=default_participants['stars_1_years'], min=0, max=NUM_STARS, description='1 Year:', style={'description_width': '80px'})
+    stars_2_years = widgets.BoundedIntText(value=default_participants['stars_2_years'], min=0, max=NUM_STARS, description='2 Years:', style={'description_width': '80px'})
+    stars_3_years = widgets.BoundedIntText(value=default_participants['stars_3_years'], min=0, max=NUM_STARS, description='3 Years:', style={'description_width': '80px'})
+    stars_4_years = widgets.BoundedIntText(value=default_participants['stars_4_years'], min=0, max=NUM_STARS, description='4 Years:', style={'description_width': '80px'})
+    stars_5_years = widgets.BoundedIntText(value=default_participants['stars_5_years'], min=0, max=NUM_STARS, description='5 Years:', style={'description_width': '80px'})
 
     star_controls = widgets.VBox([stars_1_years, stars_2_years, stars_3_years, stars_4_years, stars_5_years])
 
-    galaxies_1_years = widgets.IntText(value=default_participants['galaxies_1_years'], description='1 Year:', style={'description_width': '80px'})
-    galaxies_2_years = widgets.IntText(value=default_participants['galaxies_2_years'], description='2 Years:', style={'description_width': '80px'})
-    galaxies_3_years = widgets.IntText(value=default_participants['galaxies_3_years'], description='3 Years:', style={'description_width': '80px'})
-    galaxies_4_years = widgets.IntText(value=default_participants['galaxies_4_years'], description='4 Years:', style={'description_width': '80px'})
-    galaxies_5_years = widgets.IntText(value=default_participants['galaxies_5_years'], description='5 Years:', style={'description_width': '80px'})
+    galaxies_1_years = widgets.BoundedIntText(value=default_participants['galaxies_1_years'], min=0, max=NUM_GALAXIES, description='1 Year:', style={'description_width': '80px'})
+    galaxies_2_years = widgets.BoundedIntText(value=default_participants['galaxies_2_years'], min=0, max=NUM_GALAXIES, description='2 Years:', style={'description_width': '80px'})
+    galaxies_3_years = widgets.BoundedIntText(value=default_participants['galaxies_3_years'], min=0, max=NUM_GALAXIES, description='3 Years:', style={'description_width': '80px'})
+    galaxies_4_years = widgets.BoundedIntText(value=default_participants['galaxies_4_years'], min=0, max=NUM_GALAXIES, description='4 Years:', style={'description_width': '80px'})
+    galaxies_5_years = widgets.BoundedIntText(value=default_participants['galaxies_5_years'], min=0, max=NUM_GALAXIES, description='5 Years:', style={'description_width': '80px'})
 
     galaxy_controls = widgets.VBox([galaxies_1_years, galaxies_2_years, galaxies_3_years, galaxies_4_years, galaxies_5_years])