The Lamaze Spin & Explore Garden Gym is £24.50 at Amazon right now, down from £34.99.
I don't have one of these but I know a few friends who list this as one of their favourite bits of baby gear.
Apparently it's ideal for encouraging babies to love tummy time - something none of my brood ever particularly enjoyed!
Essentially, it's a baby play mat with special 'grow-with-me' features which means you can change the format as your baby reaches new stages of development. It helps to promote upper body strength and lower leg development, as babies spin around and explore. Once your baby is able to sit unaided you can remove the spinning section, and continue to use it as a baby play mat.
As is always the case when you spend £10 or more with Amazon delivery will be free!