If you're looking for a fun way to get your kids up and moving while you reinforce synonyms and antonyms, this whole group card game will certainly meet that need. It is appropriate for mid-late first grade.
This product includes 2 card games. There are 13 matching sets of cards in each one. One card contains a word with a clipart image. The matching card contains a sentence that uses a synonym (or antonym) for the word on the first card. Distribute one card per student. Give a signal and watch your students as they move about the room to locate their partners. They'll ask to play again and again!
6 slides + 3 (title, credits, etc...) = 9