$1.$Use Free play to promote vocabulary:It's a great time to use children's interests to introduce new words when they are playing. Take turns pouring water with the kids while they play at the water table, for instance, and talk about how the various "containers" hold different "amounts" of water. Assuming you see a kid gathering train tracks, you could participate with him and discuss how you can "interface" the tracks so the train can "travel" significantly farther. Answer in simple language