At 6 months (and 3 months and 9 months) my daughter went on just about every ride without a height restriction (didn't do AstroOrbiter, but that was mostly cause I feel like I'm going to fall out so I didn't want to take her on it) at both WDW and DL. She loved every 'kiddie' ride, but definitely liked the indoor ones better. What I mean is that while she liked Dumbo, Triceratops Spin, and Aladdin, she liked Peter Pan, Pooh Bear, etc. much better. And it makes sense cause at that age they don't realize Dumbo is a ride or that they're in an elephant, but they like looking at the scenes in the rides like Snow White. Have fun!