Baby gear/contraptions/containers all refer to a piece of equipment that puts a baby into a position and keeps them there. Gear like a swing, bouncer, exersaucer, jumper, or Bumbo. Most of this gear puts baby into a position they are not yet ready to maintain on their own and can not get into/out of on their own - meaning it’s not developmentally appropriate for them. Containers prevent a baby from moving in and out of positions naturally! Developmentally speaking, the devices pictured above, generally put babies into positions their little bodies are not yet ready for and they prevent baby from freely moving.