Hi, if you are looking at a three wheeler check the brakes and that it has an added wrist strap.

Last year in SA a couple of these prams rolled down hills and ended up in the river with baby in them.

like all prams i guess the idea is to never park them on a slight slope.

Check the pram to make sure it will fit in your car and that its not to heavy for you to push or pick up on your own.

There are heaps and heaps of prams out there that can attach a toddler seat too, I guess the best thing is to go shopping and try them all out, check the handle out how easy they fold and how stable they are by pushing them around the shop.

Hope this helps
Tan 32