Different baby rocker models and brands will be different. Some baby rockers may require some assembly, while others may already be pre-assembled. If you buy a baby rocker that needs to be assembled, it usually comes with instructions and the tools you need to help you complete the assembly. If you are unsure about assembling or disassembling the baby rocker, it is recommended that you check the instructions or contact the manufacturer for more information. If ease of assembly and disassembly is important to you, be sure to look for models that are specifically marketed as easy to assemble, with minimal or no extra tools required. You can also read reviews and check the manufacturer's specifications to get an idea of how easy or difficult a particular rocker is to set up and take down. All baby rockers from Yo Baby are very easy to assemble and disassemble, without any tools required.