Ok...I think there are two different ways of looking at this dream and I would look at both. The dream "stage" or setting is a New Apartment. Because houses represent current states of consciousness it shows that once again you are evolving, are in a new phase of your life but there may be a lot of ongoing changes to your attitudes , represented by the word "apartment". Apartment are usally temporary places to live. In the "backyard" of this new state of mind..."It's a carnival". So think about what carnival means to you. Has your life been a freak show lately, or are there too many people who have been transient or temporary? The Mother with the physically challenged child decides to take a ride. Ok....this is where you must look at the dream in two different ways.
No.l...the mother can represent you and some Creative Business Project ..this business may be damaged, is it beyond all hope, are people surprised the business still exists but manages to go on somehow? The "ride was too wild"....So could it be that you have a business that ride is just too bumpy and it wouldn't be long in your mind that The LIfe is gone from it.
No.2.....If your current business life is going smoothly and there are no problems in that end of your world, then it may be the dream is showing you (remember all exaggerated form) the mother may have lived a bit on the wild side and did things unintentionally that may have harmed her baby.
Why you keep having dreams of A child that is being harmed, could be that Spirit wants you Alert to that chance encounter in your life where you may have knowledge or witness to a child being harmed and would hope there would be some way for you to intervene.
As to the child, in real life, that was challenged....It is said in most metaphysical writings that children who come into the world with special challenges CHOSE that life pattern in order to learn a specific lesson or to help others learn a specific lesson. It is that person's own freewill and choice to live a lifetime, no matter how long or short, with spirit knowledge that it is for someone's best....even if painful.
..just my thoughts..
TL