We did gymbaroo with ds1 and 2 and only recently stopped due to not having enough days/hours in the week to fit everything in. I cannot speak highly enough of gymbaroo. DS1 did it for over 2 years - he learnt sooooooo much and in my opinion it helped his development in so many ways. Have you had a look at their website - I am pretty sure (from memory) that they give an overview of the classes and their focus/misson statement etc. They give such personal attention to each child and focus on a different developmental area each week. It is quite structured, but I like that, although there is some free play time. I am really starting to see some of the benefits now in DS1 eg his memory, agility, balance, word recognition etc - this may have happened naturally for him, but I think gymbaroo gave a fantastic base for him to grow from.

Another option is kindergym which isnt quite as structured but still offers lots of games,singing, play equipment.

Good luck.
Jem