Boys Circus Themed Birthday Party Can Toss Game Ideas (Party Top Carnival Themes)
East Coast Mommy: Carnival Games and Activities (Make snowman faces on them for Frozen theme)
Fine motor popcorn circus craft- maybe for Clap Your Hands circus theme
Bear scout adventure Grin and Bear IT: This site has a bunch of fantastic DIY carnival games and activities. including this simple KNOCK DOWN game. All you need are disposable cups and a cute sign!
The Snowman Factory Invitation to Create (with Homemade Playdough)~ Buggy and Buddy