The PODD 15 grid set for The Grid 2 complements the PODD (Pragmatic Organisation Dynamic Display) communication books. It is similar in language level and organisation to the one-page opening, expanded functions books. The PODD15 is designed to support children learning to express one to four key word sentences. The grid set has built-in scaffolds, including pragmatic branch starters and predictable links, to support communication.
More information and a manual available here: http://www.sensorysoftware.com/podd.html