[Closed] Child seats

OK so... I've got a weeride, it's good despite the limitations, but boy is getting bigger. I'd like to get something that'll do him as he grows, probably until he reaches school age and his sister can then ride to school which is quite close but the opposite direction from his nursery.

I can't fit a rear child seat without getting a different tag-along, which his sister uses, and I like having him in front despite the frog's legs. Does anyone know a top tube mounted saddle/frame mounted footpegs that'll work with cables running along the top of the top tube? I heard of one that has a bar to mount the seat on similar to the weeride, but can't remember the name.

Ta!