I've made an I Spy quilt with duplicates of each block and I explain to everyone how it works and the games that can be played. Most never realised the concept and were pleasantly surprised. Usually once you start explaining, you can guage whether or not the recipient knows how an I Spy quilt can be used and you can then tailor your explanation to suit. Wouldn't it be awful though if the recipient didn't realise the concept of the quilt and it was never used for learning? It would be such a waste, so 'explain away' is my opinion.