I guess this topic has been discussed here but I find it hard to navigate through all the useful information in the site:
My twin girls turned 4 yesterday and I am not sure if I can use seat pads and backrests, or do I still need Thule Yepp Maxi for them? They are a bit small to their age and weight about 16 Kg each.

Thank you for the helpful information. I now realize that these seats will not fit for my 3.5 YO twins because they lack any safety harness. I'll probably have to use two Thule Yepp Maxi Child Seats as recommended by Rad, until they'll grow up enough to seat safely without harness.

Hi all,
In my visit to Vancouver last week I came across the RadWagon you can see in the attached pic and realized it is the perfect solution to many of my problems. I live in UK so have limited access to rad products, and I can't figure out if all the extras that makes this bike perfect for my twins can be purchased, or can it only be done diy? Thanks in advance for any information.