I have created a math concept or circle time board for younger preschoolers, specifically those in the 3-4's age group, and possibly some two year olds may be ready, too. Around this time last year, I posted about making a math concept board for preschoolers and kindergarten aged children.
Clip It! - Middle Sounds activity and worksheets. Children clip pegs with the correct middle vowel on each card, then complete one of the worksheets included in the pack. FUN way to practice middle sounds! Could also use the worksheet as an assessment tool for CVC words.