Do your items require assembly? January 13, 2021 05:38 All of our products require assembly.The step-by-step instructions will be included for you to follow. We also offer assembly videos and user guides on the SIDIZ website. Related articles Can I purchase replacement parts separately? I want to fix the backrest at a certain angle. Do you have any suggestions? Is the headrest removable? Where can I get the assembly and user guide? Can I disengage the seat movement brake so the chair can move while the kids are seated?