Talk as you go. Feel how soft the sweater is. You can hold the cloth next to the buttons so I can find the right color. Putting your toddler's hands in the right position can help him learn to understand your directions. Leave for home before your child gets grumpy.
Shopping is one of many ways to surround children with meaningful talk.
They need to hear a lot of words in order to learn to communicate themselves. Puppet Magic Puppets can be fascinating. Children know that puppets are not alive. And yet, they move and talk like real living things. Try making one at home.