I would personally be careful about jolly jumpers. When I was doing anti-natal classes the occupational therapist said that they are actually bad for muscle development much the same as baby walkers as babies don't yet have the strength to support their body weight and they are dangerous in that door frames can break etc. They are also on the Choice '10 things not to buy your child list'. The swing sounds like a good idea though. Olive loves her play mat as long as we add different toys to it that make noises etc which is great. IMO it might be worth doing a bit more research about the jolly jumper though.