I just thought of a pretty epic substitute to that "Evolution mod" Idea i made a while ago.
Spawn a brick, and event it so when the player touches it she or he will scale to the smallest size.
Then using delays, it could make the player change scale intil he or she is so big it cannot scale any more.
Handy for Spore like RPG's!
(Btw, i''m sorry if this isn't the right section.)