If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
Why not visit a snowdrop garden with your children? The website Rover Recommended has a list of dog and family friendly snowdrop gardens that are at their best in spring. Visiting the Rover Recommended website helps dog rescue as 100% of proceeds go to Border Collie Trust GB.