I have been designing resources for many years as I worked with preschool and primary age youngsters with delayed or impaired speech and language skills. The resources using symbols are free. My latest resources which I have illustrated are extra tasks based on Marion Blank's Language Levels (previous ones have been free). They can be used with groups of mixed language ability and are reasonably priced.
Symbols (c) Widgit Software 2010. A collection of different resources with lots of repetition. Some real people and things plus some of the gods. Info sheets can be printed 2 pp to A4 page. Word mats could be printed back to back. A self-explanatory dice board game. Two card games: Picture Pairs and a Chain Game which requires recognition of some of the vocabulary. Card games should be printed 2-sided on card.