Skyzone is a great place for all ages! I have taken my son here many times. The best time to take little ones is toddler time because its less busy.
January 31 we attended a kids birthday party on the weekend, it was very chaotic. There wasn't alot of personal attention. Save yourself a boat load of money by paying the entry fee for each kid and give them a goody bag -- skip the $300 party for 10 kids. You end up bouncing with the regular public anyhow.
The staff were quite focused on the safety of the kids jumping around. I personally would not go back on a weekend, because it was crazy busy. But what else are we Canadian suppose to do during the cold dark winters.