In general the shock/fire hazard from a DAC is no greater than your VCR. I would, however, keep stray current juice, or stray juice of any flavor away from DACs, VCRs or any other electronic component for that matter. UL Lab Approved gear will not withstand a juice incident, and deep breathing will do little, if anything, to lessen the consequences. Chinese made DACs are prone to spontaneous combustion, and in some cases nuclear fission, especially if the offending juice is in the citrus family. The notorious cover-up at Chernobyl was actually caused be a Chinese built DAC and some stray prune juice, so the danger is not entirely limited to the citrus juice. I'd suggest putting the DAC out of reach of your toddler, or purchasing a DAC with a different provenance to at least keep your neighbors safe from nuclear fallout. I'd further recommend that you make sure that any and all juice you give your toddler is consumed in a separate room from the DAC. You should also consume your juice in a separate room, but you probably already knew that.
Marco
Marco