If you have time, and find DSCS helpful,
please take a look at the post:
S.O.S. (Summer of Support)
Sunday: Seventh Sunday after Pentecost
Revised Common Lectionary – Year B
Text: Ephesians 1:3-14
Dollar Store Item: Sticker that will be used as a seal.
The Take Away: We are marked with the love of Christ, in the Holy Spirit, and God claims us!
Videos:
Narrative Lectionary
Text: 1 John 4:7-21
Dollar Store Item: Hot Chocolate Mix
The Take Away: Love is action, based in Jesus Christ. Jesus is God, and in Jesus we see God.
Videos:
Dollar Store Children Sermons 
Hi John. I was looking at your blog this week and I thought about another way of speaking of being sealed by the Holy Spirit. As I recall, sealing in the early church was associated with and done in conjunction with baptism. What about demonstrating this using a sheet of paper which has a “watermark” embedded that when held up to the “light” the watermark is made visible. I got this idea from a pastor friend years ago whose dad happened to work in the printing business.
I love it! Reminds me of using black light when I was a kid and used to go to the fair. They would see you are marked on the back of the hands.
I tend to use that as talking about the law show us our sin.
I really like using the watermark for the connection to baptism. Thank you for sharing!!!
~ j.w.s.
Actually, a black light works better than a regular flashlight to highlight the watermark.