I'll probably get flamed for this, but the safety of your child is only worth 50 bucks? Your child is approaching the weight limit for many seats, even the good ones (that cost about $150) so I suggest you consider a trailer instead of a seat. They a...
Chariot carriers are recognised as the leaders in kids trailers. They are very expensive though. Even the safest trailer depends mostly on the "nut" on the bike. Here is a good site for trailer info
do not get these bikes they are cheap and really crappy go to this site and look at some real they are costly but super nice!!