That really depends.
1) Jenga - Well, its jenga...so if you could see yourself playing Jenga against a computer using the Wii mote then it is probably worth something, else not really. Avg score of about 1.5ish from review websites
2) Ninjabread man - Quite possibly one of the worse Wii games out there. I mean seriously. I would consider it a negative to any collection...and I own some pretty bad games. Average review score of 1.5 (painfully high for this game)
3) Balls of Fury - The movie was kind of funny. Christopher Walken normally is. But the game..not so funny. I believe it has an average score of like 1.3 from review websites.
In the end it is your choice...but at $45 it might be better to save a few extra dollars and get one good game...or if you go by review score, one mediocre game (total score for the 3 games is about 4.6 combined).