Working_wife
I send my kids to playgym once a week from 9 mths. My #1 also goes cc 2 days a week from age 2, main reason to give my parents a break. 2 is also a good age for me as she can already expressed herself very well and is fully toilet trained. They learn alot in cc, independence, listening skills, following rules etc. From 4 yrs I pulled her out of cc to preschool that follows formal school schedule more closely.
With #2, since I'm SAHM atm, I haven't decided whether to send him to cc, but he will continue with other program. He is learning and getting alot of stimulation from #1. I might just wait till he is 4 for preschool, where they develop school readiness skills too. Over here there is no stress in terms of linguistics and numeracy during the preschool ages, purely learning through play, so for me cc is purely base on need.
Happyhippo
Good or bad temper is character. But must control bad temper cannot give in. He needs to be able to express himself, will be better when he becomes more mature over the years. Maybe when he throws a tantrum, try to distract him with other things, or even just leave him crying till he stops. Maybe cc is good for him as he does not have mummy to bully and also he does not always get what he wants.