Any idea of how much this costs? Find it cool for siblings' ride :)

This looks like Vee Bee Ez Rider. It has unique connectors that fit most strollers and prams - Including umbrella style and concealed brake style. It can be found here: http://firstfewyears.com.sg/strollers/accessories/stroller-board/valco-vee-bee-ez-rider.html

Hey thanks for sharing Reine! :)

This looks Super! I want it too!