There are two types of walkers. 1. Walkers that bub pushes, like a wooden trolley. These are FABULOUS as bub needs to be able to pull to stand and balance and step independently. 2. Walkers that you place bub in with wheels on the bottom. The Australian Physio Association recommends you avoid using these walkers as they are associated with injury risk. The wheels can get caught on floor level changes, rugs, toys lying around etc and it tips.