I like the Wordle because it's creative and fun. I think the kids would enjoy it because we'd normally not do it in tennis class. It ties in the vocabulary to learning tennis and improving.
Animoto is fun to create videos for the kids. I think it'll really jazz them up. I created a couple of neat videos.
To see video click here. http://animoto.com/play/8c0zoC3q1gj5oOgrBejSfA