This was the second time I went to Legoland Billun...

This was the second time I went to Legoland Billund, the first was about 6 years ago. If you want to go there purely for the attractions you are better off at another park like Disneyland or Europapark. Not that the attractions are bad, there are some really fun ones, all in a specific Lego theme of course. A big part of the park is the Lego village: literally a village made out of Lego, with little villagers, famous buildings, cars, etc and then some other models on display, like the star wars section. To my disappointment it hasn't changed much over those six years since the last time, there were only a few more additions. That being said, it's still a fun day out, kids will definitely enjoy it. Also, the new knights joust was very entertaining. The park can be very busy during high season and holidays, so expect long queues for certain rides. And unless you want to buy some exclusive sets or clothed, you are better off buying Lego online as prices are (slightly) higher in the shops and unfortunately they don't accept the Lego VIP card.
I would advice going here first, in combination with the Lego House on a following day (combi tickets are cheaper as well).