I had been using this for my son - bought it for £34 on ebay about 6 months ago - but he is pretty independent now and just walks
Its a Litaf buggy board - has a step area they can stand on and a seat area they can sit on - fits most buggies - all fittings included - its scuffed as its been well used but now sat in my cupboard of no use to me!
There is a good pic on here:
Baby Assistant Limited PUSHCHAIR ACCESSORIES
Would like it gone asap - tenner and its yours!
Lyn