I've seen many beautiful examples of these little Triduum displays, so I thought you might like to visit a few of these websites and blogs to get some inspiration to make your own.
Craft, Interrupted has this fun Easter garden.
Here is a neat tomb; it's an egg!
See this at Toddler Activities at Home
Familia Catolica has made clever use of a potato in this garden.
Go check it out!
The Crafty Homeschooling Mama as a great post
about this lovely garden:
At the Butterfly Ball made this cute little display.
Mary and Joseph's Gem has a few pictures of this
A Holy Experience has pictures of this garden.
Visit The Frugal Homemaker for this tutorial.
JOY-filled Family has a beautiful garden, too.
Visit Tiffany to see her