Mackenzie does Gymbaroo (and loves it) but only since she was 18 months old. (she's now 3) It has been great for her at that age as she never crawled so never climbed and the Gymbaroo equipment really helped her to learn to climb etc. Also the routine of play, mat/dance/treasure bag, play has been good for her - it has helped her follow structure. I would recommend it but maybe at a later age. I think at 6 weeks you can give your baby as much stimulation as they would get at Babyroo but thats just my opinion. Mackenzie did swimming from 9 months even in winter. The pools are all heated and it's nice and warm in buildings etc. When dressing her at swimming I always give her a warm shower, wrap her up and then dress her top half first then worry about the bottom, just to keep her chest warm. I think Gymbaroo give you a free trial session no harm in going to get a vibe yourself.