Well recently I havnt been able to update my TTDS so I am forced to play old games, so I gave lego star wars the complete saga a shot and even tough it's very easy it's also very fun, it's been a long time since I had this much fun with a platformer probably since the psx/n64 era.
then I decided to get the lego batman game and it was even more fun, it was slightly more challenging, still sort of easy but better than the lego star wars IMO.
A friend of mine got the indiana jones one and he says it's better than the star wars version as well, but I havnt gave it a shot yet since I havnt cleared neither of these 2 games.
I highly recomend these games, specially to those who own one of those flashcards.
cheers!