Children that age love children songs (Wheels on the Bus, London Bridge, or how about that Frozen song "Let it go" *cringe*). They love games like Simon Says - you can use simple commands and mimic them to help them out (close your eyes, read a book, touch something red, jump, sit).
I've listed a lot of ideas here:
English Commander
On this website you can also create custom games with words they are learning to make it fun.