I took a wonderful class that taught a lot about how you can create a full and rich learning environment for your children by using what she called "A Triangle for Learning". Here is the basic idea:
An example: You see an episode of "Curious George" (Season 1 Eps. 11 "Animal Magnetism") about magnets and talk to your child a little bit about what they thought of the show. Later you read a book about magnets like "The Wiener Dog Magnet by Hayes Roberts" which is a very funny story about a wiener dog magnet that attracts actual wiener dogs and discuss it a little bit. You can make a trip to the library for this or already have a book on hand, it's a lot of fun either way but making a special trip to the library every so often for a book about something your child has seen can really make your child feel extra special too. Now that you've done the first two you can do a fun activity about magnets, it can be as simple as letting your child play with refrigerator magnets and see what they will stick to or you can get other ideas from books like "Mudpies to Magnets" or from websites, You can also get a Magnetic Discovery Board or make one yourself.
You don't have to follow in that exact order, or even all in the same day, as long as you do all three, relatively soon, there are benefits for each so do what works for you.