Thought I'd post a few really unique items we have done over the past few years that might spark some new ideas.
First Baptist Grapevine. If you can't tell, this is the front of an old sanctuary. We transformed a 40+ year old sanctuary into a mini-family entertainment center for kids. So we needed to dress up the front of the church, hide the baptismal, choir loft, wood paneling, etc.
First Baptist Athens. This is an exterior portico facing the busiest street in town and serves as a huge draw and statement that "we want your kids to come to church!". We wrapped the columns with tree trunks and extended the foliage onto the sides. We made the windows a bit "wonky" to add the whimsical nature of their theme. Inside this newly created space is an arcade for the kids.
Geyer Springs Baptist Church. We created this 50's themed diner that hosts all kinds of activities for the children's ministry. It complements an automotive theme seen throughout the building with cars, drive in movie theater themed worship room, garage themed game room and more.