I've always enjoyed Wacky Web Tales - good practice for writing and grammar. Who can come up with and post the wackiest tale? MadLibs are more grown up - just as hilarious. Try mad-libbing your own version of "Eleanor Rigby" by the Beatles or The Princess and the Pea
Grammar games - and more English language games & BBC skillwise games
Three games to test your longer sentence skills. Spot the sentences, make sentences and put a text into sentences.
Have fun - and please share your wackiest web tale/madlibs.