I've seen the word wonder used some times for Allah(swt) like in the below Hadith
Sahih Bukhari Hadith No. 3010 Narrated Abu Huraira(ra): The Prophet(pbuh) said, Allah(swt) wonders at those people who will enter Paradise in chains.
also in a variation in Quran 37:12 Allah(swt) is given wonder attribute (بَلْ عَجِبْتُ وَيَسْخَرُونَ)
I know that Allah's wonder is something that befits His majesty, but how can we explain it to a non-muslim?