DIY canopy: 2 curtain rods and 2 sets of LILL sheer curtains, (all from ikea). Mount one rod on the ceiling, and the other on the wall. "Swoop" to your liking. I finished it off with lights (also from Ikea), and a fluffy Ralph Lauren duvet, (thanks mom).
I like this. Center a rod attached to the ceiling and aligned with the middle of the mattress. Hang and drape a measurably long length of fabric into a canopy. It gives a tent effect. Kids love that. Plus, you can add and remove on a whim.