I watched and (apprently!) still know the entire theme song, which is wild because they stopped making new episodes when I was a toddler. Must have been in reru

I watched and (apprently!) still know the entire theme song, which is wild because they stopped making new episodes when I was a toddler. Must have been in reruns; I wonder if it was that after school / pre-dinner time slice when we watched Happy Days and 321 Contact?