Here is a rather interesting idea created by Fr. Johannes of St. Josef parish in Triesenberg, Liechtenstein.
Some might know Sticker Albums for sporting events. Well, let me say it doesn’t always have to be football or soccer. Our motto is: “STICK around for God.” Every Sunday the children receive a sticker that illustrates the gospel reading.
They can place it and collect it in their album, which moreover has curious or interesting facts about the Church and her liturgy: “Why are there often steps leading to a Church? What does Advent mean? What is so “white” about White (Whit) Sunday?…”
A copy of the Sunday Sticker Album (5,5 x 8,5 inches, 40 pages, ca. 70 stickers) serves a whole liturgical year (A,B or C). It is generic and unused copies can be used again 3 years later when the reading cycle returns.
On the site Sunday Stickers there is a video presenting this.