To do the baby sign for top, your dominant hand starts with palm looking down in a flat position above your non-dominant hand, which should be held flat and vertically, perpendicular to your dominant hand. Your dominant hand should then bob up and down over your non-dominant hand, touching its fingertips a few times.
Teach your baby or toddler the top sign when introducing them to locations of objects. You can use it in the context of play, or to teach your baby the location of items as they learn to explore the world around them.
Use top in conjunction with objects and location references, for example, on top of the fridge or at the top of the hill.