I think it's a great idea and it'll look great. In the children's room, I made the bridge only from opals and added lights to look like a real Galaxy. TBH, it took a while to glue each stone, and there was quite a lot. So I decided to buy suddenly 1000 Opals for the eventuality and I ordered them online
from here. The thing is, it wasn't enough for work, and I had to make another order out of 500 stones. However, it was worth it because we got a clearly outstanding bridge in the end, and the children appreciated it because they sit only there and play.