baby bouncer 
noun British
A harness suspended by elastic or a spring, into which a baby is put, with its feet within reach of the floor, to exercise its legs.So, I get the pot of carefully home-made carrot & pea puree, strap him into a baby bouncer (suitably swathed with a muslin square), bib him and take a deep breath....
- In the last few years the turkey processing plant Twydale's has closed, as well as clothing manufacturer Dewhirst, as well as Cindico, which made baby bouncers.
- The other is that I'm in a cot or a baby bouncer or something and I hear someone clearly say something about ‘three day week’.