maybe do a bunch of little "theta-ism"s (disney themed) hung along the walls? could be written on kites? e.g. "i wanna be where the theta's are" or "a dream is a wish your (theta inside a heart) makes", "a whole new world with theta", etc
Flats are one of the most economical types of cloth diapers, and large flats are ideal for older/larger babies or heavy wetters. Very few brands make them, though, so here is a comprehensive list of where to buy LARGE flat cloth diapers!