Baby sensory play doesn't always have to include food, paint, or water. For example, if you have a 5-month-old, you can have them lie on your shins during play to help improve their head and neck strength gently. This is a fun activity to help get baby's head and neck ready for sitting in the high chair to eat. Head control is a major milestone, and by 6 months, most babies have gained enough strength in their neck and upper body to hold their head up to start solids safely.