Well, I ended up actually finding all the stuff I needed to do the "egg geode" project with Logan. We just started our second "batch" of these and should have enough to give to visiting friends by Sunday morning!
This was part of our house church's celebration of Easter. My friend on the left did an Easter egg hunt with a dozen numbered eggs, each containing a symbol of Jesus' death and resurrection, and then told the kids the Easter story using the symbols. It was beautiful and the kids loved it.